diff --git a/.github/workflows/unit-tests.yaml b/.github/workflows/unit-tests.yaml
index bfd7f2523fc..d79c21792be 100644
--- a/.github/workflows/unit-tests.yaml
+++ b/.github/workflows/unit-tests.yaml
@@ -46,9 +46,17 @@ jobs:
                     -   php-version: '8.1'
                         symfony-version: '6.4.*'
                         os: 'windows-latest'
+                    # Explicit Symfony versions
+                    -  php-version: '8.1'
+                       symfony-version: '6.4.*'
+                    -  php-version: '8.2'
+                       symfony-version: '7.3.*' # TODO: change to '7.4' when Symfony 7.4 is released
+                    -  php-version: '8.4'
+                       symfony-version: '8.0.x-dev' # TODO: change to '8.0' when Symfony 8.0 is released
+                       minimum-stability: 'dev' # TODO: remove when Symfony 8.0 is released
 
         env:
-            SYMFONY_REQUIRE: ${{ matrix.symfony-version || '>=5.4' }}
+            SYMFONY_REQUIRE: ${{ matrix.symfony-version || '>=5.4' }} # TODO: To change to '>=6.4' in 3.x
         steps:
             - uses: actions/checkout@v4
 
diff --git a/src/Autocomplete/CHANGELOG.md b/src/Autocomplete/CHANGELOG.md
index 41dd6e8a55c..0af4bde9d78 100644
--- a/src/Autocomplete/CHANGELOG.md
+++ b/src/Autocomplete/CHANGELOG.md
@@ -1,5 +1,9 @@
 # CHANGELOG
 
+## 2.29.0
+
+-  Add Symfony 8 support
+
 ## 2.28.0
 
 -   Default plugins like `clear_button` or `remove_button` can now be removed when setting their value to `false` in the `tom_select_options.plugins` option, for example:
diff --git a/src/Autocomplete/composer.json b/src/Autocomplete/composer.json
index f8253d95b9d..e1c906c40bd 100644
--- a/src/Autocomplete/composer.json
+++ b/src/Autocomplete/composer.json
@@ -25,11 +25,11 @@
     },
     "require": {
         "php": ">=8.1",
-        "symfony/dependency-injection": "^6.3|^7.0",
+        "symfony/dependency-injection": "^6.3|^7.0|^8.0",
         "symfony/deprecation-contracts": "^2.5|^3",
-        "symfony/http-foundation": "^6.3|^7.0",
-        "symfony/http-kernel": "^6.3|^7.0",
-        "symfony/property-access": "^6.3|^7.0"
+        "symfony/http-foundation": "^6.3|^7.0|^8.0",
+        "symfony/http-kernel": "^6.3|^7.0|^8.0",
+        "symfony/property-access": "^6.3|^7.0|^8.0"
     },
     "require-dev": {
         "doctrine/collections": "^1.6.8|^2.0",
@@ -37,15 +37,15 @@
         "doctrine/orm": "^2.9.4|^3.0",
         "fakerphp/faker": "^1.22",
         "mtdowling/jmespath.php": "^2.6",
-        "symfony/form": "^6.3|^7.0",
-        "symfony/options-resolver": "^6.3|^7.0",
-        "symfony/framework-bundle": "^6.3|^7.0",
+        "symfony/form": "^6.3|^7.0|^8.0",
+        "symfony/options-resolver": "^6.3|^7.0|^8.0",
+        "symfony/framework-bundle": "^6.3|^7.0|^8.0",
         "symfony/maker-bundle": "^1.40",
-        "symfony/phpunit-bridge": "^6.3|^7.0",
-        "symfony/process": "^6.3|^7.0",
-        "symfony/security-bundle": "^6.3|^7.0",
-        "symfony/twig-bundle": "^6.3|^7.0",
-        "symfony/uid": "^6.3|^7.0",
+        "symfony/phpunit-bridge": "^6.3|^7.0|^8.0",
+        "symfony/process": "^6.3|^7.0|^8.0",
+        "symfony/security-bundle": "^6.3|^7.0|^8.0",
+        "symfony/twig-bundle": "^6.3|^7.0|^8.0",
+        "symfony/uid": "^6.3|^7.0|^8.0",
         "twig/twig": "^2.14.7|^3.0.4",
         "zenstruck/browser": "^1.1",
         "zenstruck/foundry": "^2.0"
diff --git a/src/Autocomplete/doc/index.rst b/src/Autocomplete/doc/index.rst
index aa759554ec7..972479d7fe3 100644
--- a/src/Autocomplete/doc/index.rst
+++ b/src/Autocomplete/doc/index.rst
@@ -112,7 +112,7 @@ Or, create the field by hand::
     #[AsEntityAutocompleteField]
     class FoodAutocompleteField extends AbstractType
     {
-        public function configureOptions(OptionsResolver $resolver)
+        public function configureOptions(OptionsResolver $resolver): void
         {
             $resolver->setDefaults([
                 'class' => Food::class,
@@ -512,7 +512,7 @@ your ``configureOptions()`` method:
 
 .. code-block:: diff
 
-    public function configureOptions(OptionsResolver $resolver)
+    public function configureOptions(OptionsResolver $resolver): void
     {
         $resolver->setDefaults([
             'class' => Food::class,
diff --git a/src/Autocomplete/src/Form/ParentEntityAutocompleteType.php b/src/Autocomplete/src/Form/ParentEntityAutocompleteType.php
index 6e2350bbbec..be088ce5089 100644
--- a/src/Autocomplete/src/Form/ParentEntityAutocompleteType.php
+++ b/src/Autocomplete/src/Form/ParentEntityAutocompleteType.php
@@ -33,7 +33,7 @@ public function __construct(
     ) {
     }
 
-    public function buildForm(FormBuilderInterface $builder, array $options)
+    public function buildForm(FormBuilderInterface $builder, array $options): void
     {
         $formType = $builder->getType()->getInnerType();
         $attribute = AsEntityAutocompleteField::getInstance($formType::class);
@@ -52,7 +52,7 @@ public function buildForm(FormBuilderInterface $builder, array $options)
             ->setDataMapper($this);
     }
 
-    public function finishView(FormView $view, FormInterface $form, array $options)
+    public function finishView(FormView $view, FormInterface $form, array $options): void
     {
         // Add a custom block prefix to inner field to ease theming:
         array_splice($view['autocomplete']->vars['block_prefixes'], -1, 0, 'ux_entity_autocomplete_inner');
@@ -65,7 +65,7 @@ public function finishView(FormView $view, FormInterface $form, array $options)
         $view->vars['compound_data'] = true;
     }
 
-    public function configureOptions(OptionsResolver $resolver)
+    public function configureOptions(OptionsResolver $resolver): void
     {
         $resolver->setDefaults([
             'multiple' => false,
diff --git a/src/Autocomplete/tests/Fixtures/Form/AlternateRouteAutocompleteType.php b/src/Autocomplete/tests/Fixtures/Form/AlternateRouteAutocompleteType.php
index 2ef4025187a..f9b841b5f08 100644
--- a/src/Autocomplete/tests/Fixtures/Form/AlternateRouteAutocompleteType.php
+++ b/src/Autocomplete/tests/Fixtures/Form/AlternateRouteAutocompleteType.php
@@ -20,7 +20,7 @@
 #[AsEntityAutocompleteField(route: 'ux_autocomplete_alternate')]
 class AlternateRouteAutocompleteType extends AbstractType
 {
-    public function configureOptions(OptionsResolver $resolver)
+    public function configureOptions(OptionsResolver $resolver): void
     {
         $resolver->setDefaults([
             'class' => Ingredient::class,
diff --git a/src/Autocomplete/tests/Fixtures/Form/CategoryAutocompleteType.php b/src/Autocomplete/tests/Fixtures/Form/CategoryAutocompleteType.php
index 5f96dc3f369..671878bd155 100644
--- a/src/Autocomplete/tests/Fixtures/Form/CategoryAutocompleteType.php
+++ b/src/Autocomplete/tests/Fixtures/Form/CategoryAutocompleteType.php
@@ -27,7 +27,7 @@ public function __construct(private RequestStack $requestStack)
     {
     }
 
-    public function configureOptions(OptionsResolver $resolver)
+    public function configureOptions(OptionsResolver $resolver): void
     {
         $resolver->setDefaults([
             'class' => Category::class,
diff --git a/src/Autocomplete/tests/Fixtures/Form/CategoryNoChoiceLabelAutocompleteType.php b/src/Autocomplete/tests/Fixtures/Form/CategoryNoChoiceLabelAutocompleteType.php
index 9b80ea84968..92936fe3db9 100644
--- a/src/Autocomplete/tests/Fixtures/Form/CategoryNoChoiceLabelAutocompleteType.php
+++ b/src/Autocomplete/tests/Fixtures/Form/CategoryNoChoiceLabelAutocompleteType.php
@@ -20,7 +20,7 @@
 #[AsEntityAutocompleteField]
 class CategoryNoChoiceLabelAutocompleteType extends AbstractType
 {
-    public function configureOptions(OptionsResolver $resolver)
+    public function configureOptions(OptionsResolver $resolver): void
     {
         $resolver->setDefaults([
             'class' => Category::class,
diff --git a/src/Autocomplete/tests/Fixtures/Form/IngredientAutocompleteType.php b/src/Autocomplete/tests/Fixtures/Form/IngredientAutocompleteType.php
index c2b636ceea7..0b57ea04733 100644
--- a/src/Autocomplete/tests/Fixtures/Form/IngredientAutocompleteType.php
+++ b/src/Autocomplete/tests/Fixtures/Form/IngredientAutocompleteType.php
@@ -22,7 +22,7 @@
 #[AsEntityAutocompleteField]
 class IngredientAutocompleteType extends AbstractType
 {
-    public function configureOptions(OptionsResolver $resolver)
+    public function configureOptions(OptionsResolver $resolver): void
     {
         $resolver->setDefaults([
             'class' => Ingredient::class,
diff --git a/src/Autocomplete/tests/Fixtures/Form/ProductWithTagsAutocompleteType.php b/src/Autocomplete/tests/Fixtures/Form/ProductWithTagsAutocompleteType.php
index 68390e0868c..5998e1a5001 100644
--- a/src/Autocomplete/tests/Fixtures/Form/ProductWithTagsAutocompleteType.php
+++ b/src/Autocomplete/tests/Fixtures/Form/ProductWithTagsAutocompleteType.php
@@ -20,7 +20,7 @@
 #[AsEntityAutocompleteField]
 class ProductWithTagsAutocompleteType extends AbstractType
 {
-    public function configureOptions(OptionsResolver $resolver)
+    public function configureOptions(OptionsResolver $resolver): void
     {
         $resolver->setDefaults([
             'class' => Product::class,
diff --git a/src/Chartjs/CHANGELOG.md b/src/Chartjs/CHANGELOG.md
index 2e4ed856fc6..8ab43dfdf37 100644
--- a/src/Chartjs/CHANGELOG.md
+++ b/src/Chartjs/CHANGELOG.md
@@ -1,5 +1,9 @@
 # CHANGELOG
 
+## 2.29.0
+
+-  Add Symfony 8 support
+
 ## 2.23.0
 
 -   Listen to Stimulus `disconnect` event to destroy the chart #1944
diff --git a/src/Chartjs/composer.json b/src/Chartjs/composer.json
index b4f1190bde2..5f1c0948d3f 100644
--- a/src/Chartjs/composer.json
+++ b/src/Chartjs/composer.json
@@ -29,16 +29,16 @@
     },
     "require": {
         "php": ">=8.1",
-        "symfony/config": "^5.4|^6.0|^7.0",
-        "symfony/dependency-injection": "^5.4|^6.0|^7.0",
-        "symfony/http-kernel": "^5.4|^6.0|^7.0",
+        "symfony/config": "^5.4|^6.0|^7.0|^8.0",
+        "symfony/dependency-injection": "^5.4|^6.0|^7.0|^8.0",
+        "symfony/http-kernel": "^5.4|^6.0|^7.0|^8.0",
         "symfony/stimulus-bundle": "^2.9.1"
     },
     "require-dev": {
-        "symfony/framework-bundle": "^5.4|^6.0|^7.0",
-        "symfony/phpunit-bridge": "^5.4|^6.0|^7.0",
-        "symfony/twig-bundle": "^5.4|^6.0|^7.0",
-        "symfony/var-dumper": "^5.4|^6.0|^7.0"
+        "symfony/framework-bundle": "^5.4|^6.0|^7.0|^8.0",
+        "symfony/phpunit-bridge": "^5.4|^6.0|^7.0|^8.0",
+        "symfony/twig-bundle": "^5.4|^6.0|^7.0|^8.0",
+        "symfony/var-dumper": "^5.4|^6.0|^7.0|^8.0"
     },
     "conflict": {
         "symfony/flex": "<1.13"
diff --git a/src/Chartjs/src/DependencyInjection/ChartjsExtension.php b/src/Chartjs/src/DependencyInjection/ChartjsExtension.php
index b3e8716d129..f706f87de03 100644
--- a/src/Chartjs/src/DependencyInjection/ChartjsExtension.php
+++ b/src/Chartjs/src/DependencyInjection/ChartjsExtension.php
@@ -28,7 +28,7 @@
  */
 class ChartjsExtension extends Extension implements PrependExtensionInterface
 {
-    public function load(array $configs, ContainerBuilder $container)
+    public function load(array $configs, ContainerBuilder $container): void
     {
         $container
             ->setDefinition('chartjs.builder', new Definition(ChartBuilder::class))
@@ -48,7 +48,7 @@ public function load(array $configs, ContainerBuilder $container)
         ;
     }
 
-    public function prepend(ContainerBuilder $container)
+    public function prepend(ContainerBuilder $container): void
     {
         if (!$this->isAssetMapperAvailable($container)) {
             return;
diff --git a/src/Cropperjs/CHANGELOG.md b/src/Cropperjs/CHANGELOG.md
index 159f5bef7a7..171d58b65d1 100644
--- a/src/Cropperjs/CHANGELOG.md
+++ b/src/Cropperjs/CHANGELOG.md
@@ -1,5 +1,9 @@
 # CHANGELOG
 
+## 2.29.0
+
+-  Add Symfony 8 support
+
 ## 2.13.2
 
 -   Revert "Change JavaScript package to `type: module`"
diff --git a/src/Cropperjs/composer.json b/src/Cropperjs/composer.json
index 545195d3642..fbf22907651 100644
--- a/src/Cropperjs/composer.json
+++ b/src/Cropperjs/composer.json
@@ -30,19 +30,19 @@
     "require": {
         "php": ">=8.1",
         "intervention/image": "^2.5",
-        "symfony/config": "^5.4|^6.0|^7.0",
-        "symfony/dependency-injection": "^5.4|^6.0|^7.0",
-        "symfony/form": "^5.4|^6.0|^7.0",
-        "symfony/http-kernel": "^5.4|^6.0|^7.0",
-        "symfony/options-resolver": "^5.4|^6.0|^7.0",
-        "symfony/validator": "^5.4|^6.0|^7.0"
+        "symfony/config": "^5.4|^6.0|^7.0|^8.0",
+        "symfony/dependency-injection": "^5.4|^6.0|^7.0|^8.0",
+        "symfony/form": "^5.4|^6.0|^7.0|^8.0",
+        "symfony/http-kernel": "^5.4|^6.0|^7.0|^8.0",
+        "symfony/options-resolver": "^5.4|^6.0|^7.0|^8.0",
+        "symfony/validator": "^5.4|^6.0|^7.0|^8.0"
     },
     "require-dev": {
-        "symfony/expression-language": "^5.4|^6.0|^7.0",
-        "symfony/framework-bundle": "^5.4|^6.0|^7.0",
-        "symfony/phpunit-bridge": "^5.4|^6.0|^7.0",
-        "symfony/twig-bundle": "^5.4|^6.0|^7.0",
-        "symfony/var-dumper": "^5.4|^6.0|^7.0",
+        "symfony/expression-language": "^5.4|^6.0|^7.0|^8.0",
+        "symfony/framework-bundle": "^5.4|^6.0|^7.0|^8.0",
+        "symfony/phpunit-bridge": "^5.4|^6.0|^7.0|^8.0",
+        "symfony/twig-bundle": "^5.4|^6.0|^7.0|^8.0",
+        "symfony/var-dumper": "^5.4|^6.0|^7.0|^8.0",
         "twig/twig": "^2.14.7|^3.0.4"
     },
     "conflict": {
diff --git a/src/Cropperjs/src/DependencyInjection/CropperjsExtension.php b/src/Cropperjs/src/DependencyInjection/CropperjsExtension.php
index 26a8de5b60c..56de4113800 100644
--- a/src/Cropperjs/src/DependencyInjection/CropperjsExtension.php
+++ b/src/Cropperjs/src/DependencyInjection/CropperjsExtension.php
@@ -29,7 +29,7 @@
  */
 class CropperjsExtension extends Extension implements PrependExtensionInterface
 {
-    public function load(array $configs, ContainerBuilder $container)
+    public function load(array $configs, ContainerBuilder $container): void
     {
         $container
             ->setDefinition('form.cropper', new Definition(CropperType::class))
@@ -51,7 +51,7 @@ public function load(array $configs, ContainerBuilder $container)
         $container->setAlias(CropperInterface::class, 'cropper')->setPublic(false);
     }
 
-    public function prepend(ContainerBuilder $container)
+    public function prepend(ContainerBuilder $container): void
     {
         if (!$this->isAssetMapperAvailable($container)) {
             return;
diff --git a/src/Cropperjs/src/Form/CropperType.php b/src/Cropperjs/src/Form/CropperType.php
index de2f70d6a0c..9f0c55e318a 100644
--- a/src/Cropperjs/src/Form/CropperType.php
+++ b/src/Cropperjs/src/Form/CropperType.php
@@ -26,7 +26,7 @@
  */
 class CropperType extends AbstractType
 {
-    public function buildForm(FormBuilderInterface $builder, array $options)
+    public function buildForm(FormBuilderInterface $builder, array $options): void
     {
         $builder
             ->add('options', HiddenType::class, [
@@ -40,7 +40,7 @@ public function buildForm(FormBuilderInterface $builder, array $options)
         ;
     }
 
-    public function buildView(FormView $view, FormInterface $form, array $options)
+    public function buildView(FormView $view, FormInterface $form, array $options): void
     {
         $view->vars['attr']['class'] = trim(($view->vars['attr']['class'] ?? '').' cropperjs');
 
@@ -50,7 +50,7 @@ public function buildView(FormView $view, FormInterface $form, array $options)
         }
     }
 
-    public function configureOptions(OptionsResolver $resolver)
+    public function configureOptions(OptionsResolver $resolver): void
     {
         $resolver->setRequired('public_url');
         $resolver->setAllowedTypes('public_url', 'string');
@@ -62,7 +62,7 @@ public function configureOptions(OptionsResolver $resolver)
         ]);
     }
 
-    public function getBlockPrefix()
+    public function getBlockPrefix(): string
     {
         return 'cropper';
     }
diff --git a/src/Dropzone/CHANGELOG.md b/src/Dropzone/CHANGELOG.md
index 77389fe0f19..1e178d9c441 100644
--- a/src/Dropzone/CHANGELOG.md
+++ b/src/Dropzone/CHANGELOG.md
@@ -1,5 +1,9 @@
 # CHANGELOG
 
+## 2.29.0
+
+-  Add Symfony 8 support
+
 ## 2.20
 
 -   Enable file replacement via "drag-and-drop"
diff --git a/src/Dropzone/composer.json b/src/Dropzone/composer.json
index e4bda48342f..fa7a52623fb 100644
--- a/src/Dropzone/composer.json
+++ b/src/Dropzone/composer.json
@@ -29,17 +29,17 @@
     },
     "require": {
         "php": ">=8.1",
-        "symfony/config": "^5.4|^6.0|^7.0",
-        "symfony/dependency-injection": "^5.4|^6.0|^7.0",
-        "symfony/form": "^5.4|^6.0|^7.0",
-        "symfony/http-kernel": "^5.4|^6.0|^7.0",
-        "symfony/options-resolver": "^5.4|^6.0|^7.0"
+        "symfony/config": "^5.4|^6.0|^7.0|^8.0",
+        "symfony/dependency-injection": "^5.4|^6.0|^7.0|^8.0",
+        "symfony/form": "^5.4|^6.0|^7.0|^8.0",
+        "symfony/http-kernel": "^5.4|^6.0|^7.0|^8.0",
+        "symfony/options-resolver": "^5.4|^6.0|^7.0|^8.0"
     },
     "require-dev": {
-        "symfony/framework-bundle": "^5.4|^6.0|^7.0",
-        "symfony/phpunit-bridge": "^5.4|^6.0|^7.0",
-        "symfony/twig-bundle": "^5.4|^6.0|^7.0",
-        "symfony/var-dumper": "^5.4|^6.0|^7.0",
+        "symfony/framework-bundle": "^5.4|^6.0|^7.0|^8.0",
+        "symfony/phpunit-bridge": "^5.4|^6.0|^7.0|^8.0",
+        "symfony/twig-bundle": "^5.4|^6.0|^7.0|^8.0",
+        "symfony/var-dumper": "^5.4|^6.0|^7.0|^8.0",
         "twig/twig": "^2.14.7|^3.0.4"
     },
     "extra": {
diff --git a/src/Dropzone/doc/index.rst b/src/Dropzone/doc/index.rst
index 85624d9b38b..5813fa3ca41 100644
--- a/src/Dropzone/doc/index.rst
+++ b/src/Dropzone/doc/index.rst
@@ -43,7 +43,7 @@ replacement of the native FileType class::
 
     class CommentFormType extends AbstractType
     {
-        public function buildForm(FormBuilderInterface $builder, array $options)
+        public function buildForm(FormBuilderInterface $builder, array $options): void
         {
             $builder
                 // ...
@@ -136,7 +136,7 @@ Then in your form, add your controller as an HTML attribute::
 
     class CommentFormType extends AbstractType
     {
-        public function buildForm(FormBuilderInterface $builder, array $options)
+        public function buildForm(FormBuilderInterface $builder, array $options): void
         {
             $builder
                 // ...
diff --git a/src/Dropzone/src/DependencyInjection/DropzoneExtension.php b/src/Dropzone/src/DependencyInjection/DropzoneExtension.php
index 697d1249840..4f260d27a92 100644
--- a/src/Dropzone/src/DependencyInjection/DropzoneExtension.php
+++ b/src/Dropzone/src/DependencyInjection/DropzoneExtension.php
@@ -45,7 +45,7 @@ public function prepend(ContainerBuilder $container): void
         }
     }
 
-    public function load(array $configs, ContainerBuilder $container)
+    public function load(array $configs, ContainerBuilder $container): void
     {
         $container
             ->setDefinition('form.dropzone', new Definition(DropzoneType::class))
diff --git a/src/Dropzone/src/Form/DropzoneType.php b/src/Dropzone/src/Form/DropzoneType.php
index d0e73271c61..7c0dbdffe6e 100644
--- a/src/Dropzone/src/Form/DropzoneType.php
+++ b/src/Dropzone/src/Form/DropzoneType.php
@@ -22,7 +22,7 @@
  */
 class DropzoneType extends AbstractType
 {
-    public function configureOptions(OptionsResolver $resolver)
+    public function configureOptions(OptionsResolver $resolver): void
     {
         $resolver->setDefaults([
             'attr' => [
@@ -31,12 +31,12 @@ public function configureOptions(OptionsResolver $resolver)
         ]);
     }
 
-    public function getParent()
+    public function getParent(): string
     {
         return FileType::class;
     }
 
-    public function getBlockPrefix()
+    public function getBlockPrefix(): string
     {
         return 'dropzone';
     }
diff --git a/src/Icons/CHANGELOG.md b/src/Icons/CHANGELOG.md
index 0c856de7799..3eea06bcc5d 100644
--- a/src/Icons/CHANGELOG.md
+++ b/src/Icons/CHANGELOG.md
@@ -1,5 +1,9 @@
 # CHANGELOG
 
+## 2.29.0
+
+-  Add Symfony 8 support
+
 ## 2.25.0
 
 -   Improve DX when `symfony/http-client` is not installed.
diff --git a/src/Icons/composer.json b/src/Icons/composer.json
index 469effc3a2f..83d0a25d25f 100644
--- a/src/Icons/composer.json
+++ b/src/Icons/composer.json
@@ -36,14 +36,14 @@
     },
     "require": {
         "php": ">=8.1",
-        "symfony/framework-bundle": "^6.4|^7.0",
-        "symfony/twig-bundle": "^6.4|^7.0"
+        "symfony/framework-bundle": "^6.4|^7.0|^8.0",
+        "symfony/twig-bundle": "^6.4|^7.0|^8.0"
     },
     "require-dev": {
-        "symfony/asset-mapper": "^6.4|^7.0",
-        "symfony/console": "^6.4|^7.0",
-        "symfony/http-client": "6.4|^7.0",
-        "symfony/phpunit-bridge": "^6.3|^7.0",
+        "symfony/asset-mapper": "^6.4|^7.0|^8.0",
+        "symfony/console": "^6.4|^7.0|^8.0",
+        "symfony/http-client": "6.4|^7.0|^8.0",
+        "symfony/phpunit-bridge": "^6.3|^7.0|^8.0",
         "symfony/ux-twig-component": "^2.14",
         "zenstruck/console-test": "^1.5",
         "psr/log": "^2|^3"
diff --git a/src/LazyImage/CHANGELOG.md b/src/LazyImage/CHANGELOG.md
index e5a3d00312e..694aa1b60ca 100644
--- a/src/LazyImage/CHANGELOG.md
+++ b/src/LazyImage/CHANGELOG.md
@@ -1,5 +1,9 @@
 # CHANGELOG
 
+## 2.29.0
+
+-  Add Symfony 8 support
+
 ## 2.26.0
 
 -   Deprecate the package
diff --git a/src/LazyImage/composer.json b/src/LazyImage/composer.json
index f15a99eda48..4eef83304ef 100644
--- a/src/LazyImage/composer.json
+++ b/src/LazyImage/composer.json
@@ -29,19 +29,19 @@
     },
     "require": {
         "php": ">=8.1",
-        "symfony/config": "^5.4|^6.0|^7.0",
-        "symfony/http-kernel": "^5.4|^6.0|^7.0",
-        "symfony/dependency-injection": "^5.4|^6.0|^7.0",
+        "symfony/config": "^5.4|^6.0|^7.0|^8.0",
+        "symfony/http-kernel": "^5.4|^6.0|^7.0|^8.0",
+        "symfony/dependency-injection": "^5.4|^6.0|^7.0|^8.0",
         "symfony/deprecation-contracts": "^2.5|^3"
     },
     "require-dev": {
         "intervention/image": "^2.5|^3.0",
         "kornrunner/blurhash": "^1.1",
-        "symfony/cache-contracts": "^2.2",
-        "symfony/framework-bundle": "^5.4|^6.0|^7.0",
-        "symfony/phpunit-bridge": "^5.2|^6.0|^7.0",
-        "symfony/twig-bundle": "^5.4|^6.0|^7.0",
-        "symfony/var-dumper": "^5.4|^6.0|^7.0"
+        "symfony/cache-contracts": "^2.2|^3.0",
+        "symfony/framework-bundle": "^5.4|^6.0|^7.0|^8.0",
+        "symfony/phpunit-bridge": "^5.2|^6.0|^7.0|^8.0",
+        "symfony/twig-bundle": "^5.4|^6.0|^7.0|^8.0",
+        "symfony/var-dumper": "^5.4|^6.0|^7.0|^8.0"
     },
     "extra": {
         "thanks": {
diff --git a/src/LazyImage/src/DependencyInjection/LazyImageExtension.php b/src/LazyImage/src/DependencyInjection/LazyImageExtension.php
index 52405f71bbb..07981b592be 100644
--- a/src/LazyImage/src/DependencyInjection/LazyImageExtension.php
+++ b/src/LazyImage/src/DependencyInjection/LazyImageExtension.php
@@ -34,7 +34,7 @@
  */
 class LazyImageExtension extends Extension implements PrependExtensionInterface
 {
-    public function load(array $configs, ContainerBuilder $container)
+    public function load(array $configs, ContainerBuilder $container): void
     {
         $configuration = new Configuration();
         $config = $this->processConfiguration($configuration, $configs);
@@ -83,7 +83,7 @@ public function load(array $configs, ContainerBuilder $container)
         ;
     }
 
-    public function prepend(ContainerBuilder $container)
+    public function prepend(ContainerBuilder $container): void
     {
         if (!$this->isAssetMapperAvailable($container)) {
             return;
diff --git a/src/LiveComponent/CHANGELOG.md b/src/LiveComponent/CHANGELOG.md
index 06863ce27af..561c086e70d 100644
--- a/src/LiveComponent/CHANGELOG.md
+++ b/src/LiveComponent/CHANGELOG.md
@@ -1,5 +1,9 @@
 # CHANGELOG
 
+## 2.29.0
+
+-  Add Symfony 8 support
+
 ## 2.28.0
 
 -   Add new modifiers for input validations, useful to prevent unnecessary HTTP requests:
diff --git a/src/LiveComponent/composer.json b/src/LiveComponent/composer.json
index 093723c9521..189f7b45a4d 100644
--- a/src/LiveComponent/composer.json
+++ b/src/LiveComponent/composer.json
@@ -28,8 +28,8 @@
     "require": {
         "php": ">=8.1",
         "symfony/deprecation-contracts": "^2.5|^3.0",
-        "symfony/property-access": "^5.4.5|^6.0|^7.0",
-        "symfony/property-info": "^5.4|^6.0|^7.0",
+        "symfony/property-access": "^5.4.5|^6.0|^7.0|^8.0",
+        "symfony/property-info": "^5.4|^6.0|^7.0|^8.0",
         "symfony/stimulus-bundle": "^2.9",
         "symfony/ux-twig-component": "^2.25.1",
         "twig/twig": "^3.10.3"
@@ -41,17 +41,17 @@
         "doctrine/orm": "^2.9.4",
         "doctrine/persistence": "^2.5.2|^3.0",
         "phpdocumentor/reflection-docblock": "5.x-dev",
-        "symfony/dependency-injection": "^5.4|^6.0|^7.0",
-        "symfony/expression-language": "^5.4|^6.0|^7.0",
-        "symfony/form": "^5.4|^6.0|^7.0",
-        "symfony/framework-bundle": "^5.4|^6.0|^7.0",
-        "symfony/options-resolver": "^5.4|^6.0|^7.0",
-        "symfony/phpunit-bridge": "^6.1|^7.0",
-        "symfony/security-bundle": "^5.4|^6.0|^7.0",
-        "symfony/serializer": "^5.4|^6.0|^7.0",
-        "symfony/twig-bundle": "^5.4|^6.0|^7.0",
-        "symfony/uid": "^5.4|^6.0|^7.0",
-        "symfony/validator": "^5.4|^6.0|^7.0",
+        "symfony/dependency-injection": "^5.4|^6.0|^7.0|^8.0",
+        "symfony/expression-language": "^5.4|^6.0|^7.0|^8.0",
+        "symfony/form": "^5.4|^6.0|^7.0|^8.0",
+        "symfony/framework-bundle": "^5.4|^6.0|^7.0|^8.0",
+        "symfony/options-resolver": "^5.4|^6.0|^7.0|^8.0",
+        "symfony/phpunit-bridge": "^6.1|^7.0|^8.0",
+        "symfony/security-bundle": "^5.4|^6.0|^7.0|^8.0",
+        "symfony/serializer": "^5.4|^6.0|^7.0|^8.0",
+        "symfony/twig-bundle": "^5.4|^6.0|^7.0|^8.0",
+        "symfony/uid": "^5.4|^6.0|^7.0|^8.0",
+        "symfony/validator": "^5.4|^6.0|^7.0|^8.0",
         "zenstruck/browser": "^1.2.0",
         "zenstruck/foundry": "^2.0"
     },
diff --git a/src/LiveComponent/doc/index.rst b/src/LiveComponent/doc/index.rst
index 9701f13fc82..46f0c7e1bdf 100644
--- a/src/LiveComponent/doc/index.rst
+++ b/src/LiveComponent/doc/index.rst
@@ -1438,7 +1438,7 @@ instant validation as the user types::
 
     class PostType extends AbstractType
     {
-        public function buildForm(FormBuilderInterface $builder, array $options)
+        public function buildForm(FormBuilderInterface $builder, array $options): void
         {
             $builder
                 ->add('title')
@@ -1447,7 +1447,7 @@ instant validation as the user types::
             ;
         }
 
-        public function configureOptions(OptionsResolver $resolver)
+        public function configureOptions(OptionsResolver $resolver): void
         {
             $resolver->setDefaults([
                 'data_class' => Post::class,
@@ -1749,7 +1749,7 @@ typing! To fix this, either re-render on the ``change`` event (which
 fires after the text box loses focus) or set the ``trim`` option of your
 field to ``false``::
 
-    public function buildForm(FormBuilderInterface $builder, array $options)
+    public function buildForm(FormBuilderInterface $builder, array $options): void
     {
         $builder
             // ...
@@ -1768,7 +1768,7 @@ a submit.
 
 To fix this, set the ``always_empty`` option to ``false`` in your form::
 
-    public function buildForm(FormBuilderInterface $builder, array $options)
+    public function buildForm(FormBuilderInterface $builder, array $options): void
     {
         $builder
             // ...
@@ -1818,7 +1818,7 @@ via the ``CollectionType``::
 
     class BlogPostFormType extends AbstractType
     {
-        public function buildForm(FormBuilderInterface $builder, array $options)
+        public function buildForm(FormBuilderInterface $builder, array $options): void
         {
             $builder
                 ->add('title', TextType::class)
@@ -1832,7 +1832,7 @@ via the ``CollectionType``::
             ;
         }
 
-        public function configureOptions(OptionsResolver $resolver)
+        public function configureOptions(OptionsResolver $resolver): void
         {
             $resolver->setDefaults(['data_class' => BlogPost::class]);
         }
@@ -1964,7 +1964,7 @@ via the ``LiveCollectionType``::
 
     class BlogPostFormType extends AbstractType
     {
-        public function buildForm(FormBuilderInterface $builder, array $options)
+        public function buildForm(FormBuilderInterface $builder, array $options): void
         {
             $builder
                 ->add('title', TextType::class)
@@ -1975,7 +1975,7 @@ via the ``LiveCollectionType``::
             ;
         }
 
-        public function configureOptions(OptionsResolver $resolver)
+        public function configureOptions(OptionsResolver $resolver): void
         {
             $resolver->setDefaults(['data_class' => BlogPost::class]);
         }
diff --git a/src/LiveComponent/src/DependencyInjection/LiveComponentExtension.php b/src/LiveComponent/src/DependencyInjection/LiveComponentExtension.php
index 4315638e869..ffe6c88b2fd 100644
--- a/src/LiveComponent/src/DependencyInjection/LiveComponentExtension.php
+++ b/src/LiveComponent/src/DependencyInjection/LiveComponentExtension.php
@@ -66,7 +66,7 @@ final class LiveComponentExtension extends Extension implements PrependExtension
 {
     public const TEMPLATES_MAP_FILENAME = 'live_components_twig_templates.map';
 
-    public function prepend(ContainerBuilder $container)
+    public function prepend(ContainerBuilder $container): void
     {
         // Register the form theme if TwigBundle is available
         $bundles = $container->getParameter('kernel.bundles');
diff --git a/src/LiveComponent/tests/Fixtures/Factory/CategoryFixtureEntityFactory.php b/src/LiveComponent/tests/Fixtures/Factory/CategoryFixtureEntityFactory.php
index ccc7d8d7e76..e9e53e9abdf 100644
--- a/src/LiveComponent/tests/Fixtures/Factory/CategoryFixtureEntityFactory.php
+++ b/src/LiveComponent/tests/Fixtures/Factory/CategoryFixtureEntityFactory.php
@@ -14,6 +14,9 @@
 use Symfony\UX\LiveComponent\Tests\Fixtures\Entity\CategoryFixtureEntity;
 use Zenstruck\Foundry\Persistence\PersistentProxyObjectFactory;
 
+/**
+ * @extends PersistentProxyObjectFactory<CategoryFixtureEntity>
+ */
 final class CategoryFixtureEntityFactory extends PersistentProxyObjectFactory
 {
     protected function defaults(): array|callable
diff --git a/src/LiveComponent/tests/Fixtures/Form/BlogPostFormLiveCollectionType.php b/src/LiveComponent/tests/Fixtures/Form/BlogPostFormLiveCollectionType.php
index e7898ee6f3a..c013dc1ad24 100644
--- a/src/LiveComponent/tests/Fixtures/Form/BlogPostFormLiveCollectionType.php
+++ b/src/LiveComponent/tests/Fixtures/Form/BlogPostFormLiveCollectionType.php
@@ -21,7 +21,7 @@
 
 class BlogPostFormLiveCollectionType extends AbstractType
 {
-    public function buildForm(FormBuilderInterface $builder, array $options)
+    public function buildForm(FormBuilderInterface $builder, array $options): void
     {
         $builder
             ->add('title', TextType::class)
@@ -34,14 +34,14 @@ public function buildForm(FormBuilderInterface $builder, array $options)
         ;
     }
 
-    public function configureOptions(OptionsResolver $resolver)
+    public function configureOptions(OptionsResolver $resolver): void
     {
         $resolver->setDefaults([
             'data_class' => BlogPost::class,
         ]);
     }
 
-    public function getBlockPrefix()
+    public function getBlockPrefix(): string
     {
         return 'blog_post_form';
     }
diff --git a/src/LiveComponent/tests/Fixtures/Form/BlogPostFormType.php b/src/LiveComponent/tests/Fixtures/Form/BlogPostFormType.php
index 584bcdbc823..cd9c3bbd872 100644
--- a/src/LiveComponent/tests/Fixtures/Form/BlogPostFormType.php
+++ b/src/LiveComponent/tests/Fixtures/Form/BlogPostFormType.php
@@ -21,7 +21,7 @@
 
 class BlogPostFormType extends AbstractType
 {
-    public function buildForm(FormBuilderInterface $builder, array $options)
+    public function buildForm(FormBuilderInterface $builder, array $options): void
     {
         $builder
             ->add('title', TextType::class)
@@ -34,7 +34,7 @@ public function buildForm(FormBuilderInterface $builder, array $options)
         ;
     }
 
-    public function configureOptions(OptionsResolver $resolver)
+    public function configureOptions(OptionsResolver $resolver): void
     {
         $resolver->setDefaults([
             'data_class' => BlogPost::class,
diff --git a/src/LiveComponent/tests/Fixtures/Form/CommentFormType.php b/src/LiveComponent/tests/Fixtures/Form/CommentFormType.php
index e7b5e5e5dfb..37ebd4e8a3f 100644
--- a/src/LiveComponent/tests/Fixtures/Form/CommentFormType.php
+++ b/src/LiveComponent/tests/Fixtures/Form/CommentFormType.php
@@ -19,14 +19,14 @@
 
 class CommentFormType extends AbstractType
 {
-    public function buildForm(FormBuilderInterface $builder, array $options)
+    public function buildForm(FormBuilderInterface $builder, array $options): void
     {
         $builder
             ->add('content', TextareaType::class)
         ;
     }
 
-    public function configureOptions(OptionsResolver $resolver)
+    public function configureOptions(OptionsResolver $resolver): void
     {
         $resolver->setDefaults([
             'data_class' => Comment::class,
diff --git a/src/LiveComponent/tests/Fixtures/Form/ComplexFieldType.php b/src/LiveComponent/tests/Fixtures/Form/ComplexFieldType.php
index e3281c73031..520a049c7e2 100644
--- a/src/LiveComponent/tests/Fixtures/Form/ComplexFieldType.php
+++ b/src/LiveComponent/tests/Fixtures/Form/ComplexFieldType.php
@@ -11,12 +11,12 @@
 
 class ComplexFieldType extends AbstractType
 {
-    public function buildForm(FormBuilderInterface $builder, array $options)
+    public function buildForm(FormBuilderInterface $builder, array $options): void
     {
         $builder->add('sub_field', TextType::class);
     }
 
-    public function finishView(FormView $view, FormInterface $form, array $options)
+    public function finishView(FormView $view, FormInterface $form, array $options): void
     {
         // try to confuse ComponentWithFormTrait
         // mimics what autocomplete does
diff --git a/src/LiveComponent/tests/Fixtures/Form/FormWithManyDifferentFieldsType.php b/src/LiveComponent/tests/Fixtures/Form/FormWithManyDifferentFieldsType.php
index bc3794a22c8..1cb10aac995 100644
--- a/src/LiveComponent/tests/Fixtures/Form/FormWithManyDifferentFieldsType.php
+++ b/src/LiveComponent/tests/Fixtures/Form/FormWithManyDifferentFieldsType.php
@@ -30,7 +30,7 @@
  */
 class FormWithManyDifferentFieldsType extends AbstractType
 {
-    public function buildForm(FormBuilderInterface $builder, array $options)
+    public function buildForm(FormBuilderInterface $builder, array $options): void
     {
         $builder
             ->add('text', TextType::class)
diff --git a/src/LiveComponent/tests/Fixtures/Form/UserFormType.php b/src/LiveComponent/tests/Fixtures/Form/UserFormType.php
index 99bd456d38c..e0103151dad 100644
--- a/src/LiveComponent/tests/Fixtures/Form/UserFormType.php
+++ b/src/LiveComponent/tests/Fixtures/Form/UserFormType.php
@@ -19,14 +19,14 @@
 
 class UserFormType extends AbstractType
 {
-    public function buildForm(FormBuilderInterface $builder, array $options)
+    public function buildForm(FormBuilderInterface $builder, array $options): void
     {
         $builder
             ->add('username', TextType::class)
         ;
     }
 
-    public function configureOptions(OptionsResolver $resolver)
+    public function configureOptions(OptionsResolver $resolver): void
     {
         $resolver->setDefaults([
             'data_class' => User::class,
diff --git a/src/Map/CHANGELOG.md b/src/Map/CHANGELOG.md
index 9b7ac7ef5f1..e5f5dc35431 100644
--- a/src/Map/CHANGELOG.md
+++ b/src/Map/CHANGELOG.md
@@ -1,5 +1,9 @@
 # CHANGELOG
 
+## 2.29.0
+
+-  Add Symfony 8 support
+
 ## 2.28
 
 -  Add `minZoom` and `maxZoom` options to `Map` to set the minimum and maximum zoom levels
diff --git a/src/Map/composer.json b/src/Map/composer.json
index 909e090ec33..635ac9638ff 100644
--- a/src/Map/composer.json
+++ b/src/Map/composer.json
@@ -36,11 +36,11 @@
         "symfony/stimulus-bundle": "^2.18.1"
     },
     "require-dev": {
-        "symfony/asset-mapper": "^6.4|^7.0",
-        "symfony/framework-bundle": "^6.4|^7.0",
-        "symfony/phpunit-bridge": "^7.2",
-        "symfony/twig-bundle": "^6.4|^7.0",
-        "symfony/ux-twig-component": "^2.18",
+        "symfony/asset-mapper": "^6.4|^7.0|^8.0",
+        "symfony/framework-bundle": "^6.4|^7.0|^8.0",
+        "symfony/phpunit-bridge": "^7.2|^8.0",
+        "symfony/twig-bundle": "^6.4|^7.0|^8.0",
+        "symfony/ux-twig-component": "^2.18|^8.0",
         "symfony/ux-icons": "^2.18",
         "spatie/phpunit-snapshot-assertions": "^4.2.17",
         "phpunit/phpunit": "^9.6.22"
diff --git a/src/Map/src/Bridge/Google/CHANGELOG.md b/src/Map/src/Bridge/Google/CHANGELOG.md
index fbdc858d9c9..0e8fe128388 100644
--- a/src/Map/src/Bridge/Google/CHANGELOG.md
+++ b/src/Map/src/Bridge/Google/CHANGELOG.md
@@ -1,5 +1,9 @@
 # CHANGELOG
 
+## 2.29.0
+
+-  Add Symfony 8 support
+
 ## 2.27
 
 -   Fix `InfoWindow` compatibility with new `Circle` and `Rectangle` supported elements.
diff --git a/src/Map/src/Bridge/Google/composer.json b/src/Map/src/Bridge/Google/composer.json
index 7889f360787..a6fd6d1b71d 100644
--- a/src/Map/src/Bridge/Google/composer.json
+++ b/src/Map/src/Bridge/Google/composer.json
@@ -21,7 +21,7 @@
         "symfony/ux-map": "^2.19"
     },
     "require-dev": {
-        "symfony/phpunit-bridge": "^7.2",
+        "symfony/phpunit-bridge": "^7.2|^8.0",
         "symfony/ux-icons": "^2.18",
         "spatie/phpunit-snapshot-assertions": "^4.2.17",
         "phpunit/phpunit": "^9.6.22"
diff --git a/src/Map/src/Bridge/Leaflet/CHANGELOG.md b/src/Map/src/Bridge/Leaflet/CHANGELOG.md
index a9e17804201..0b5fc0eb405 100644
--- a/src/Map/src/Bridge/Leaflet/CHANGELOG.md
+++ b/src/Map/src/Bridge/Leaflet/CHANGELOG.md
@@ -1,5 +1,9 @@
 # CHANGELOG
 
+## 2.29.0
+
+-  Add Symfony 8 support
+
 ## 2.27
 
 -  Add `attributionControl` and `attributionControlOptions` to `LeafletOptions`,
diff --git a/src/Map/src/Bridge/Leaflet/composer.json b/src/Map/src/Bridge/Leaflet/composer.json
index f33e00cd48a..7b7bba54c5c 100644
--- a/src/Map/src/Bridge/Leaflet/composer.json
+++ b/src/Map/src/Bridge/Leaflet/composer.json
@@ -21,7 +21,7 @@
         "symfony/ux-map": "^2.19"
     },
     "require-dev": {
-        "symfony/phpunit-bridge": "^7.2",
+        "symfony/phpunit-bridge": "^7.2|^8.0",
         "symfony/ux-icons": "^2.18",
         "spatie/phpunit-snapshot-assertions": "^4.2.17",
         "phpunit/phpunit": "^9.6.22"
diff --git a/src/Map/tests/Kernel/FrameworkAppKernel.php b/src/Map/tests/Kernel/FrameworkAppKernel.php
index 1246a8d8d13..82704b4c3a5 100644
--- a/src/Map/tests/Kernel/FrameworkAppKernel.php
+++ b/src/Map/tests/Kernel/FrameworkAppKernel.php
@@ -32,7 +32,7 @@ public function registerBundles(): iterable
         return [new FrameworkBundle(), new StimulusBundle(), new UXMapBundle()];
     }
 
-    public function registerContainerConfiguration(LoaderInterface $loader)
+    public function registerContainerConfiguration(LoaderInterface $loader): void
     {
         $loader->load(function (ContainerBuilder $container) {
             $container->loadFromExtension('framework', ['secret' => '$ecret', 'test' => true, 'http_method_override' => false]);
diff --git a/src/Map/tests/Kernel/TwigAppKernel.php b/src/Map/tests/Kernel/TwigAppKernel.php
index 364b843d518..8acc3816e5a 100644
--- a/src/Map/tests/Kernel/TwigAppKernel.php
+++ b/src/Map/tests/Kernel/TwigAppKernel.php
@@ -33,7 +33,7 @@ public function registerBundles(): iterable
         return [new FrameworkBundle(), new StimulusBundle(), new TwigBundle(), new UXMapBundle()];
     }
 
-    public function registerContainerConfiguration(LoaderInterface $loader)
+    public function registerContainerConfiguration(LoaderInterface $loader): void
     {
         $loader->load(function (ContainerBuilder $container) {
             $container->loadFromExtension('framework', ['secret' => '$ecret', 'test' => true, 'http_method_override' => false]);
diff --git a/src/Map/tests/Kernel/TwigComponentKernel.php b/src/Map/tests/Kernel/TwigComponentKernel.php
index 7ee33360058..b1c590863a1 100644
--- a/src/Map/tests/Kernel/TwigComponentKernel.php
+++ b/src/Map/tests/Kernel/TwigComponentKernel.php
@@ -38,7 +38,7 @@ public function registerBundles(): iterable
         ];
     }
 
-    public function registerContainerConfiguration(LoaderInterface $loader)
+    public function registerContainerConfiguration(LoaderInterface $loader): void
     {
         $loader->load(function (ContainerBuilder $container) {
             $container->loadFromExtension('framework', [
diff --git a/src/Notify/CHANGELOG.md b/src/Notify/CHANGELOG.md
index e1daa04d829..40a72344e09 100644
--- a/src/Notify/CHANGELOG.md
+++ b/src/Notify/CHANGELOG.md
@@ -1,5 +1,9 @@
 # CHANGELOG
 
+## 2.29.0
+
+-  Add Symfony 8 support
+
 ## 2.24.0
 
 -   Added `options` to Notification
diff --git a/src/Notify/composer.json b/src/Notify/composer.json
index a427a302ec8..65c5b836be3 100644
--- a/src/Notify/composer.json
+++ b/src/Notify/composer.json
@@ -29,18 +29,18 @@
     },
     "require": {
         "php": ">=8.1",
-        "symfony/config": "^5.4|^6.0|^7.0",
-        "symfony/dependency-injection": "^5.4|^6.0|^7.0",
-        "symfony/http-kernel": "^5.4|^6.0|^7.0",
+        "symfony/config": "^5.4|^6.0|^7.0|^8.0",
+        "symfony/dependency-injection": "^5.4|^6.0|^7.0|^8.0",
+        "symfony/http-kernel": "^5.4|^6.0|^7.0|^8.0",
         "symfony/mercure-bundle": "^0.3.4",
-        "symfony/mercure-notifier": "^5.4|^6.0|^7.0",
+        "symfony/mercure-notifier": "^5.4|^6.0|^7.0|^8.0",
         "symfony/stimulus-bundle": "^2.9.1",
-        "symfony/twig-bundle": "^5.4|^6.0|^7.0"
+        "symfony/twig-bundle": "^5.4|^6.0|^7.0|^8.0"
     },
     "require-dev": {
-        "symfony/framework-bundle": "^5.4|^6.0|^7.0",
-        "symfony/phpunit-bridge": "^5.4|^6.0|^7.0",
-        "symfony/var-dumper": "^5.4|^6.0|^7.0"
+        "symfony/framework-bundle": "^5.4|^6.0|^7.0|^8.0",
+        "symfony/phpunit-bridge": "^5.4|^6.0|^7.0|^8.0",
+        "symfony/var-dumper": "^5.4|^6.0|^7.0|^8.0"
     },
     "conflict": {
         "symfony/config": "<5.4.0"
diff --git a/src/React/CHANGELOG.md b/src/React/CHANGELOG.md
index 5cbccbe805a..96ed8c6a744 100644
--- a/src/React/CHANGELOG.md
+++ b/src/React/CHANGELOG.md
@@ -1,5 +1,9 @@
 # CHANGELOG
 
+## 2.29.0
+
+-  Add Symfony 8 support
+
 ## 2.28.0
 
 -   [BC BREAK] By modernizing our building tools, the file `dist/render_controller.js` now does not contain any useless
diff --git a/src/React/composer.json b/src/React/composer.json
index 53fd92f79ed..46081a52359 100644
--- a/src/React/composer.json
+++ b/src/React/composer.json
@@ -32,12 +32,12 @@
         "symfony/stimulus-bundle": "^2.9.1"
     },
     "require-dev": {
-        "symfony/asset-mapper": "^6.3|^7.0",
-        "symfony/finder": "^5.4|^6.0|^7.0",
-        "symfony/framework-bundle": "^5.4|^6.0|^7.0",
-        "symfony/phpunit-bridge": "^5.4|^6.0|^7.0",
-        "symfony/twig-bundle": "^5.4|^6.0|^7.0",
-        "symfony/var-dumper": "^5.4|^6.0|^7.0"
+        "symfony/asset-mapper": "^6.3|^7.0|^8.0",
+        "symfony/finder": "^5.4|^6.0|^7.0|^8.0",
+        "symfony/framework-bundle": "^5.4|^6.0|^7.0|^8.0",
+        "symfony/phpunit-bridge": "^5.4|^6.0|^7.0|^8.0",
+        "symfony/twig-bundle": "^5.4|^6.0|^7.0|^8.0",
+        "symfony/var-dumper": "^5.4|^6.0|^7.0|^8.0"
     },
     "extra": {
         "thanks": {
diff --git a/src/React/src/DependencyInjection/ReactExtension.php b/src/React/src/DependencyInjection/ReactExtension.php
index 0d6a0269780..6b8adf8b8b3 100644
--- a/src/React/src/DependencyInjection/ReactExtension.php
+++ b/src/React/src/DependencyInjection/ReactExtension.php
@@ -31,7 +31,7 @@
  */
 class ReactExtension extends Extension implements PrependExtensionInterface, ConfigurationInterface
 {
-    public function load(array $configs, ContainerBuilder $container)
+    public function load(array $configs, ContainerBuilder $container): void
     {
         $configuration = $this->getConfiguration($configs, $container);
         $config = $this->processConfiguration($configuration, $configs);
@@ -58,7 +58,7 @@ public function load(array $configs, ContainerBuilder $container)
             ->addTag('asset_mapper.compiler');
     }
 
-    public function prepend(ContainerBuilder $container)
+    public function prepend(ContainerBuilder $container): void
     {
         if (!$this->isAssetMapperAvailable($container)) {
             return;
diff --git a/src/StimulusBundle/CHANGELOG.md b/src/StimulusBundle/CHANGELOG.md
index 46cc4512108..a2201c231da 100644
--- a/src/StimulusBundle/CHANGELOG.md
+++ b/src/StimulusBundle/CHANGELOG.md
@@ -1,5 +1,9 @@
 # CHANGELOG
 
+## 2.29.0
+
+-  Add Symfony 8 support
+
 ## 2.20.1
 
 -   Normalize Stimulus controller name in event name
diff --git a/src/StimulusBundle/composer.json b/src/StimulusBundle/composer.json
index bfceb40241f..346b2841df5 100644
--- a/src/StimulusBundle/composer.json
+++ b/src/StimulusBundle/composer.json
@@ -14,18 +14,18 @@
     ],
     "require": {
         "php": ">=8.1",
-        "symfony/config": "^5.4|^6.0|^7.0",
-        "symfony/dependency-injection": "^5.4|^6.0|^7.0",
-        "symfony/finder": "^5.4|^6.0|^7.0",
-        "symfony/http-kernel": "^5.4|^6.0|^7.0",
+        "symfony/config": "^5.4|^6.0|^7.0|^8.0",
+        "symfony/dependency-injection": "^5.4|^6.0|^7.0|^8.0",
+        "symfony/finder": "^5.4|^6.0|^7.0|^8.0",
+        "symfony/http-kernel": "^5.4|^6.0|^7.0|^8.0",
         "twig/twig": "^2.15.3|^3.8",
         "symfony/deprecation-contracts": "^2.0|^3.0"
     },
     "require-dev": {
-        "symfony/asset-mapper": "^6.3|^7.0",
-        "symfony/framework-bundle": "^5.4|^6.0|^7.0",
-        "symfony/phpunit-bridge": "^5.4|^6.0|^7.0",
-        "symfony/twig-bundle": "^5.4|^6.0|^7.0",
+        "symfony/asset-mapper": "^6.3|^7.0|^8.0",
+        "symfony/framework-bundle": "^5.4|^6.0|^7.0|^8.0",
+        "symfony/phpunit-bridge": "^5.4|^6.0|^7.0|^8.0",
+        "symfony/twig-bundle": "^5.4|^6.0|^7.0|^8.0",
         "zenstruck/browser": "^1.4"
     },
     "minimum-stability": "dev",
diff --git a/src/StimulusBundle/src/DependencyInjection/Compiler/RemoveAssetMapperServicesCompiler.php b/src/StimulusBundle/src/DependencyInjection/Compiler/RemoveAssetMapperServicesCompiler.php
index 2e29e535734..e805465dee8 100644
--- a/src/StimulusBundle/src/DependencyInjection/Compiler/RemoveAssetMapperServicesCompiler.php
+++ b/src/StimulusBundle/src/DependencyInjection/Compiler/RemoveAssetMapperServicesCompiler.php
@@ -21,7 +21,7 @@
  */
 class RemoveAssetMapperServicesCompiler implements CompilerPassInterface
 {
-    public function process(ContainerBuilder $container)
+    public function process(ContainerBuilder $container): void
     {
         if (!$container->hasDefinition('asset_mapper')) {
             $container->removeDefinition('stimulus.ux_controllers_twig_runtime');
diff --git a/src/StimulusBundle/src/StimulusBundle.php b/src/StimulusBundle/src/StimulusBundle.php
index 21e0e9a802f..e3b62084c56 100644
--- a/src/StimulusBundle/src/StimulusBundle.php
+++ b/src/StimulusBundle/src/StimulusBundle.php
@@ -25,7 +25,7 @@ public function getPath(): string
         return \dirname(__DIR__);
     }
 
-    public function build(ContainerBuilder $container)
+    public function build(ContainerBuilder $container): void
     {
         $container->addCompilerPass(new RemoveAssetMapperServicesCompiler());
     }
diff --git a/src/Svelte/CHANGELOG.md b/src/Svelte/CHANGELOG.md
index ef7204eb4d7..5c7e94c763f 100644
--- a/src/Svelte/CHANGELOG.md
+++ b/src/Svelte/CHANGELOG.md
@@ -1,5 +1,9 @@
 # CHANGELOG
 
+## 2.29.0
+
+-  Add Symfony 8 support
+
 ## 2.13.2
 
 -   Revert "Change JavaScript package to `type: module`"
diff --git a/src/Svelte/composer.json b/src/Svelte/composer.json
index 8d19662b0ad..6ce86e8dff8 100644
--- a/src/Svelte/composer.json
+++ b/src/Svelte/composer.json
@@ -36,12 +36,12 @@
         "symfony/stimulus-bundle": "^2.9.1"
     },
     "require-dev": {
-        "symfony/asset-mapper": "^6.3|^7.0",
-        "symfony/finder": "^5.4|^6.2|^7.0",
-        "symfony/framework-bundle": "^5.4|^6.2|^7.0",
-        "symfony/phpunit-bridge": "^5.4|^6.2|^7.0",
-        "symfony/twig-bundle": "^5.4|^6.2|^7.0",
-        "symfony/var-dumper": "^5.4|^6.2|^7.0"
+        "symfony/asset-mapper": "^6.3|^7.0|^8.0",
+        "symfony/finder": "^5.4|^6.2|^7.0|^8.0",
+        "symfony/framework-bundle": "^5.4|^6.2|^7.0|^8.0",
+        "symfony/phpunit-bridge": "^5.4|^6.2|^7.0|^8.0",
+        "symfony/twig-bundle": "^5.4|^6.2|^7.0|^8.0",
+        "symfony/var-dumper": "^5.4|^6.2|^7.0|^8.0"
     },
     "extra": {
         "thanks": {
diff --git a/src/Svelte/src/DependencyInjection/SvelteExtension.php b/src/Svelte/src/DependencyInjection/SvelteExtension.php
index 1b4af03dead..cdfebdde3c0 100644
--- a/src/Svelte/src/DependencyInjection/SvelteExtension.php
+++ b/src/Svelte/src/DependencyInjection/SvelteExtension.php
@@ -31,7 +31,7 @@
  */
 class SvelteExtension extends Extension implements PrependExtensionInterface, ConfigurationInterface
 {
-    public function load(array $configs, ContainerBuilder $container)
+    public function load(array $configs, ContainerBuilder $container): void
     {
         $configuration = $this->getConfiguration($configs, $container);
         $config = $this->processConfiguration($configuration, $configs);
@@ -52,7 +52,7 @@ public function load(array $configs, ContainerBuilder $container)
             ->addTag('asset_mapper.compiler', ['priority' => 100]);
     }
 
-    public function prepend(ContainerBuilder $container)
+    public function prepend(ContainerBuilder $container): void
     {
         if (!$this->isAssetMapperAvailable($container)) {
             return;
diff --git a/src/Swup/CHANGELOG.md b/src/Swup/CHANGELOG.md
index 814bd720922..0598d4df539 100644
--- a/src/Swup/CHANGELOG.md
+++ b/src/Swup/CHANGELOG.md
@@ -1,5 +1,9 @@
 # CHANGELOG
 
+## 2.29.0
+
+-  Add Symfony 8 support
+
 ## 2.26.0
 
 -   Deprecate the package
diff --git a/src/Swup/src/DependencyInjection/SwupExtension.php b/src/Swup/src/DependencyInjection/SwupExtension.php
index f71cced0f73..07e9d97b1b0 100644
--- a/src/Swup/src/DependencyInjection/SwupExtension.php
+++ b/src/Swup/src/DependencyInjection/SwupExtension.php
@@ -23,11 +23,11 @@
  */
 class SwupExtension extends Extension implements PrependExtensionInterface
 {
-    public function load(array $configs, ContainerBuilder $container)
+    public function load(array $configs, ContainerBuilder $container): void
     {
     }
 
-    public function prepend(ContainerBuilder $container)
+    public function prepend(ContainerBuilder $container): void
     {
         if (!$this->isAssetMapperAvailable($container)) {
             return;
diff --git a/src/TogglePassword/CHANGELOG.md b/src/TogglePassword/CHANGELOG.md
index ee855b97a5e..5b13aaae0b3 100644
--- a/src/TogglePassword/CHANGELOG.md
+++ b/src/TogglePassword/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ## 2.29.0
 
+-  Add Symfony 8 support
+
+## 2.29.0
+
 -   Deprecate the package
 
 ## 2.13.2
diff --git a/src/TogglePassword/composer.json b/src/TogglePassword/composer.json
index d9c989d6c44..bfb4775e372 100644
--- a/src/TogglePassword/composer.json
+++ b/src/TogglePassword/composer.json
@@ -29,18 +29,18 @@
     },
     "require": {
         "php": ">=8.1",
-        "symfony/config": "^5.4|^6.0|^7.0",
-        "symfony/dependency-injection": "^5.4|^6.0|^7.0",
-        "symfony/form": "^5.4|^6.0|^7.0",
-        "symfony/http-kernel": "^5.4|^6.0|^7.0",
-        "symfony/options-resolver": "^5.4|^6.0|^7.0",
-        "symfony/translation": "^5.4|^6.0|^7.0"
+        "symfony/config": "^5.4|^6.0|^7.0|^8.0",
+        "symfony/dependency-injection": "^5.4|^6.0|^7.0|^8.0",
+        "symfony/form": "^5.4|^6.0|^7.0|^8.0",
+        "symfony/http-kernel": "^5.4|^6.0|^7.0|^8.0",
+        "symfony/options-resolver": "^5.4|^6.0|^7.0|^8.0",
+        "symfony/translation": "^5.4|^6.0|^7.0|^8.0"
     },
     "require-dev": {
-        "symfony/framework-bundle": "^5.4|^6.0|^7.0",
-        "symfony/phpunit-bridge": "^5.4|^6.0|^7.0",
-        "symfony/twig-bundle": "^5.4|^6.0|^7.0",
-        "symfony/var-dumper": "^5.4|^6.0|^7.0",
+        "symfony/framework-bundle": "^5.4|^6.0|^7.0|^8.0",
+        "symfony/phpunit-bridge": "^5.4|^6.0|^7.0|^8.0",
+        "symfony/twig-bundle": "^5.4|^6.0|^7.0|^8.0",
+        "symfony/var-dumper": "^5.4|^6.0|^7.0|^8.0",
         "twig/twig": "^2.14.7|^3.0.4"
     },
     "extra": {
diff --git a/src/TogglePassword/doc/index.rst b/src/TogglePassword/doc/index.rst
index 111e3db33e9..97eef740491 100644
--- a/src/TogglePassword/doc/index.rst
+++ b/src/TogglePassword/doc/index.rst
@@ -53,7 +53,7 @@ Any ``PasswordType`` can be transformed into a toggle password field by adding t
 
     class CredentialFormType extends AbstractType
     {
-        public function buildForm(FormBuilderInterface $builder, array $options)
+        public function buildForm(FormBuilderInterface $builder, array $options): void
         {
             $builder
                 // ...
@@ -73,7 +73,7 @@ You can disable it by passing ``use_toggle_form_theme`` option to ``false``::
 
     class CredentialFormType extends AbstractType
     {
-        public function buildForm(FormBuilderInterface $builder, array $options)
+        public function buildForm(FormBuilderInterface $builder, array $options): void
         {
             $builder
                 // ...
@@ -103,7 +103,7 @@ to the field (use ``null`` to disable label or icon)::
 
     class CredentialFormType extends AbstractType
     {
-        public function buildForm(FormBuilderInterface $builder, array $options)
+        public function buildForm(FormBuilderInterface $builder, array $options): void
         {
             $builder
                 // ...
@@ -173,7 +173,7 @@ A ``toggle_container_classes`` option is also available to customize the contain
 
     class CredentialFormType extends AbstractType
     {
-        public function buildForm(FormBuilderInterface $builder, array $options)
+        public function buildForm(FormBuilderInterface $builder, array $options): void
         {
             $builder
                 // ...
@@ -255,7 +255,7 @@ Then in your form, add your controller as an HTML attribute::
 
     class CredentialFormType extends AbstractType
     {
-        public function buildForm(FormBuilderInterface $builder, array $options)
+        public function buildForm(FormBuilderInterface $builder, array $options): void
         {
             $builder
                 // ...
diff --git a/src/Toolkit/CHANGELOG.md b/src/Toolkit/CHANGELOG.md
index f19dba21ca7..f9b96a35f39 100644
--- a/src/Toolkit/CHANGELOG.md
+++ b/src/Toolkit/CHANGELOG.md
@@ -1,5 +1,9 @@
 # CHANGELOG
- 
+
+## 2.29.0
+
+-  Add Symfony 8 support
+
 ## 2.25
 
 -   Package added
diff --git a/src/Toolkit/composer.json b/src/Toolkit/composer.json
index 2f6d2ae7140..1b8a15949b8 100644
--- a/src/Toolkit/composer.json
+++ b/src/Toolkit/composer.json
@@ -30,21 +30,21 @@
   "require": {
     "php": ">=8.1",
     "twig/twig": "^3.0",
-    "symfony/console": "^6.4|^7.0",
-    "symfony/filesystem": "^6.4|^7.0",
-    "symfony/framework-bundle": "^6.4|^7.0",
-    "symfony/twig-bundle": "^6.4|^7.0",
+    "symfony/console": "^6.4|^7.0|^8.0",
+    "symfony/filesystem": "^6.4|^7.0|^8.0",
+    "symfony/framework-bundle": "^6.4|^7.0|^8.0",
+    "symfony/twig-bundle": "^6.4|^7.0|^8.0",
     "symfony/ux-twig-component": "^2.25.1",
-    "symfony/yaml": "^6.4|^7.0"
+    "symfony/yaml": "^6.4|^7.0|^8.0"
   },
   "require-dev": {
-    "symfony/finder": "6.4|^7.0",
+    "symfony/finder": "6.4|^7.0|^8.0",
     "twig/extra-bundle": "^3.19|^4.0",
     "twig/html-extra": "^3.19",
     "zenstruck/console-test": "^1.7",
-    "symfony/http-client": "6.4|^7.0",
-    "symfony/stopwatch": "^6.4|^7.0",
-    "symfony/phpunit-bridge": "^7.2",
+    "symfony/http-client": "6.4|^7.0|^8.0",
+    "symfony/stopwatch": "^6.4|^7.0|^8.0",
+    "symfony/phpunit-bridge": "^7.2|^8.0",
     "vincentlanglet/twig-cs-fixer": "^3.5",
     "spatie/phpunit-snapshot-assertions": "^4.2.17",
     "phpunit/phpunit": "^9.6.22",
diff --git a/src/Translator/CHANGELOG.md b/src/Translator/CHANGELOG.md
index 34532d510ef..266c9abc932 100644
--- a/src/Translator/CHANGELOG.md
+++ b/src/Translator/CHANGELOG.md
@@ -1,5 +1,9 @@
 # CHANGELOG
 
+## 2.29.0
+
+-  Add Symfony 8 support
+
 ## 2.22.0
 
 -   Support both the Symfony format (`fr_FR`) and W3C specification (`fr-FR`) for locale subcodes.
diff --git a/src/Translator/composer.json b/src/Translator/composer.json
index 0ac6e58b869..435d1addf38 100644
--- a/src/Translator/composer.json
+++ b/src/Translator/composer.json
@@ -29,16 +29,16 @@
     },
     "require": {
         "php": ">=8.1",
-        "symfony/console": "^5.4|^6.0|^7.0",
-        "symfony/filesystem": "^5.4|^6.0|^7.0",
-        "symfony/string": "^5.4|^6.0|^7.0",
-        "symfony/translation": "^5.4|^6.0|^7.0"
+        "symfony/console": "^5.4|^6.0|^7.0|^8.0",
+        "symfony/filesystem": "^5.4|^6.0|^7.0|^8.0",
+        "symfony/string": "^5.4|^6.0|^7.0|^8.0",
+        "symfony/translation": "^5.4|^6.0|^7.0|^8.0"
     },
     "require-dev": {
-        "symfony/framework-bundle": "^5.4|^6.0|^7.0",
-        "symfony/phpunit-bridge": "^5.2|^6.0|^7.0",
-        "symfony/var-dumper": "^5.4|^6.0|^7.0",
-        "symfony/yaml": "^5.4|^6.0|^7.0"
+        "symfony/framework-bundle": "^5.4|^6.0|^7.0|^8.0",
+        "symfony/phpunit-bridge": "^5.2|^6.0|^7.0|^8.0",
+        "symfony/var-dumper": "^5.4|^6.0|^7.0|^8.0",
+        "symfony/yaml": "^5.4|^6.0|^7.0|^8.0"
     },
     "extra": {
         "thanks": {
diff --git a/src/Turbo/CHANGELOG.md b/src/Turbo/CHANGELOG.md
index fef22f69cf1..df654e7c1d2 100644
--- a/src/Turbo/CHANGELOG.md
+++ b/src/Turbo/CHANGELOG.md
@@ -1,5 +1,9 @@
 # CHANGELOG
 
+## 2.29.0
+
+-  Add Symfony 8 support
+
 ## 2.24.0
 
 -   Add Twig Extensions for `meta` tags
diff --git a/src/Turbo/composer.json b/src/Turbo/composer.json
index 797f2cdd93a..db83621fa7e 100644
--- a/src/Turbo/composer.json
+++ b/src/Turbo/composer.json
@@ -41,22 +41,22 @@
         "doctrine/doctrine-bundle": "^2.4.3",
         "doctrine/orm": "^2.8 | 3.0",
         "phpstan/phpstan": "^2.1.17",
-        "symfony/asset-mapper": "^6.4|^7.0",
-        "symfony/debug-bundle": "^5.4|^6.0|^7.0",
-        "symfony/form": "^5.4|^6.0|^7.0",
-        "symfony/framework-bundle": "^6.4|^7.0",
+        "symfony/asset-mapper": "^6.4|^7.0|^8.0",
+        "symfony/debug-bundle": "^5.4|^6.0|^7.0|^8.0",
+        "symfony/form": "^5.4|^6.0|^7.0|^8.0",
+        "symfony/framework-bundle": "^6.4|^7.0|^8.0",
         "symfony/mercure-bundle": "^0.3.7",
-        "symfony/messenger": "^5.4|^6.0|^7.0",
+        "symfony/messenger": "^5.4|^6.0|^7.0|^8.0",
         "symfony/panther": "^2.2",
-        "symfony/phpunit-bridge": "^5.4|^6.0|^7.0",
-        "symfony/process": "^5.4|6.3.*|^7.0",
-        "symfony/property-access": "^5.4|^6.0|^7.0",
-        "symfony/security-core": "^5.4|^6.0|^7.0",
-        "symfony/stopwatch": "^5.4|^6.0|^7.0",
+        "symfony/phpunit-bridge": "^5.4|^6.0|^7.0|^8.0",
+        "symfony/process": "^5.4|6.3.*|^7.0|^8.0",
+        "symfony/property-access": "^5.4|^6.0|^7.0|^8.0",
+        "symfony/security-core": "^5.4|^6.0|^7.0|^8.0",
+        "symfony/stopwatch": "^5.4|^6.0|^7.0|^8.0",
         "symfony/ux-twig-component": "^2.21",
-        "symfony/twig-bundle": "^6.4|^7.0",
-        "symfony/web-profiler-bundle": "^5.4|^6.0|^7.0",
-        "symfony/expression-language": "^5.4|^6.0|^7.0",
+        "symfony/twig-bundle": "^6.4|^7.0|^8.0",
+        "symfony/web-profiler-bundle": "^5.4|^6.0|^7.0|^8.0",
+        "symfony/expression-language": "^5.4|^6.0|^7.0|^8.0",
         "dbrekelmans/bdi": "dev-main",
         "php-webdriver/webdriver": "^1.15"
     },
diff --git a/src/Turbo/src/DependencyInjection/Compiler/RegisterMercureHubsPass.php b/src/Turbo/src/DependencyInjection/Compiler/RegisterMercureHubsPass.php
index ebe97b68e98..ae7718389f7 100644
--- a/src/Turbo/src/DependencyInjection/Compiler/RegisterMercureHubsPass.php
+++ b/src/Turbo/src/DependencyInjection/Compiler/RegisterMercureHubsPass.php
@@ -25,7 +25,7 @@
  */
 final class RegisterMercureHubsPass implements CompilerPassInterface
 {
-    public function process(ContainerBuilder $container)
+    public function process(ContainerBuilder $container): void
     {
         foreach ($container->findTaggedServiceIds('mercure.hub') as $hubId => $tags) {
             $name = str_replace('mercure.hub.', '', $hubId);
diff --git a/src/Turbo/tests/app/Kernel.php b/src/Turbo/tests/app/Kernel.php
index 3f68994ea52..0f0af961c7b 100644
--- a/src/Turbo/tests/app/Kernel.php
+++ b/src/Turbo/tests/app/Kernel.php
@@ -24,6 +24,7 @@
 use Symfony\Bundle\MercureBundle\MercureBundle;
 use Symfony\Bundle\TwigBundle\TwigBundle;
 use Symfony\Bundle\WebProfilerBundle\WebProfilerBundle;
+use Symfony\Component\Config\Exception\LoaderLoadException;
 use Symfony\Component\DependencyInjection\Loader\Configurator\ContainerConfigurator;
 use Symfony\Component\Form\Extension\Core\Type\FormType;
 use Symfony\Component\Form\Extension\Core\Type\SubmitType;
@@ -132,9 +133,13 @@ protected function configureContainer(ContainerConfigurator $container): void
 
     protected function configureRoutes(RoutingConfigurator $routes): void
     {
-        $routes->import('@WebProfilerBundle/Resources/config/routing/wdt.xml')->prefix('/_wdt');
-        $routes->import('@WebProfilerBundle/Resources/config/routing/profiler.xml')->prefix('/_profiler');
-
+        try {
+            $routes->import('@WebProfilerBundle/Resources/config/routing/wdt.xml')->prefix('/_wdt');
+            $routes->import('@WebProfilerBundle/Resources/config/routing/profiler.xml')->prefix('/_profiler');
+        } catch (LoaderLoadException) {
+            $routes->import('@WebProfilerBundle/Resources/config/routing/wdt.php', 'php')->prefix('/_wdt');
+            $routes->import('@WebProfilerBundle/Resources/config/routing/profiler.php', 'php')->prefix('/_profiler');
+        }
         $routes->add('home', '/')->controller(TemplateController::class)->defaults(['template' => 'home.html.twig']);
         $routes->add('block', '/block')->controller(TemplateController::class)->defaults(['template' => 'block.html.twig']);
         $routes->add('lazy', '/lazy')->controller(TemplateController::class)->defaults(['template' => 'lazy.html.twig']);
diff --git a/src/TwigComponent/CHANGELOG.md b/src/TwigComponent/CHANGELOG.md
index 8ddd89fb4b6..d21cd8e5c7e 100644
--- a/src/TwigComponent/CHANGELOG.md
+++ b/src/TwigComponent/CHANGELOG.md
@@ -1,5 +1,9 @@
 # CHANGELOG
 
+## 2.29.0
+
+-  Add Symfony 8 support
+
 ## 2.25.2
 
 -   Fix `ComponentAttributes` rendering when using `StimulusAttributes` as default attributes
diff --git a/src/TwigComponent/composer.json b/src/TwigComponent/composer.json
index e959ae4357e..cb1e08c65e0 100644
--- a/src/TwigComponent/composer.json
+++ b/src/TwigComponent/composer.json
@@ -27,21 +27,21 @@
     },
     "require": {
         "php": ">=8.1",
-        "symfony/dependency-injection": "^5.4|^6.0|^7.0",
+        "symfony/dependency-injection": "^5.4|^6.0|^7.0|^8.0",
         "symfony/deprecation-contracts": "^2.2|^3.0",
-        "symfony/event-dispatcher": "^5.4|^6.0|^7.0",
-        "symfony/property-access": "^5.4|^6.0|^7.0",
+        "symfony/event-dispatcher": "^5.4|^6.0|^7.0|^8.0",
+        "symfony/property-access": "^5.4|^6.0|^7.0|^8.0",
         "twig/twig": "^3.10.3"
     },
     "require-dev": {
-        "symfony/console": "^5.4|^6.0|^7.0",
-        "symfony/css-selector": "^5.4|^6.0|^7.0",
-        "symfony/dom-crawler": "^5.4|^6.0|^7.0",
-        "symfony/framework-bundle": "^5.4|^6.0|^7.0",
-        "symfony/phpunit-bridge": "^6.0|^7.0",
+        "symfony/console": "^5.4|^6.0|^7.0|^8.0",
+        "symfony/css-selector": "^5.4|^6.0|^7.0|^8.0",
+        "symfony/dom-crawler": "^5.4|^6.0|^7.0|^8.0",
+        "symfony/framework-bundle": "^5.4|^6.0|^7.0|^8.0",
+        "symfony/phpunit-bridge": "^6.0|^7.0|^8.0",
         "symfony/stimulus-bundle": "^2.9.1",
-        "symfony/twig-bundle": "^5.4|^6.0|^7.0",
-        "symfony/webpack-encore-bundle": "^1.15"
+        "symfony/twig-bundle": "^5.4|^6.0|^7.0|^8.0",
+        "symfony/webpack-encore-bundle": "^1.15|^2.3.0"
     },
     "conflict": {
         "symfony/config": "<5.4.0"
diff --git a/src/TwigComponent/tests/Unit/ComponentAttributesTest.php b/src/TwigComponent/tests/Unit/ComponentAttributesTest.php
index dda7dd583f7..1009da8e558 100644
--- a/src/TwigComponent/tests/Unit/ComponentAttributesTest.php
+++ b/src/TwigComponent/tests/Unit/ComponentAttributesTest.php
@@ -79,6 +79,10 @@ public function testCanGetWithout()
      */
     public function testCanAddStimulusController()
     {
+        if (!class_exists(AbstractStimulusDto::class)) {
+            $this->markTestSkipped('AbstractStimulusDto class does not exist, skipping test.');
+        }
+
         $attributes = new ComponentAttributes([
             'class' => 'foo',
             'data-controller' => 'live',
@@ -108,6 +112,10 @@ public function testCanAddStimulusController()
      */
     public function testCanAddStimulusControllerIfNoneAlreadyPresent()
     {
+        if (!class_exists(AbstractStimulusDto::class)) {
+            $this->markTestSkipped('AbstractStimulusDto class does not exist, skipping test.');
+        }
+
         $attributes = new ComponentAttributes([
             'class' => 'foo',
         ], new EscaperRuntime());
diff --git a/src/Typed/CHANGELOG.md b/src/Typed/CHANGELOG.md
index d373a51a933..152c335d498 100644
--- a/src/Typed/CHANGELOG.md
+++ b/src/Typed/CHANGELOG.md
@@ -1,5 +1,9 @@
 # CHANGELOG
 
+## 2.29.0
+
+-  Add Symfony 8 support
+
 ## 2.26.0
 
 -   Deprecate the package
diff --git a/src/Typed/src/DependencyInjection/TypedExtension.php b/src/Typed/src/DependencyInjection/TypedExtension.php
index 5b825775a55..5e901d624c6 100644
--- a/src/Typed/src/DependencyInjection/TypedExtension.php
+++ b/src/Typed/src/DependencyInjection/TypedExtension.php
@@ -23,11 +23,11 @@
  */
 class TypedExtension extends Extension implements PrependExtensionInterface
 {
-    public function load(array $configs, ContainerBuilder $container)
+    public function load(array $configs, ContainerBuilder $container): void
     {
     }
 
-    public function prepend(ContainerBuilder $container)
+    public function prepend(ContainerBuilder $container): void
     {
         if (!$this->isAssetMapperAvailable($container)) {
             return;
diff --git a/src/Vue/CHANGELOG.md b/src/Vue/CHANGELOG.md
index a038a30695e..5040161e7ea 100644
--- a/src/Vue/CHANGELOG.md
+++ b/src/Vue/CHANGELOG.md
@@ -1,5 +1,9 @@
 # CHANGELOG
 
+## 2.29.0
+
+-  Add Symfony 8 support
+
 ## 2.13.2
 
 -   Revert "Change JavaScript package to `type: module`"
diff --git a/src/Vue/composer.json b/src/Vue/composer.json
index 14e65e6238e..bf3f80c37df 100644
--- a/src/Vue/composer.json
+++ b/src/Vue/composer.json
@@ -36,12 +36,12 @@
         "symfony/stimulus-bundle": "^2.9.1"
     },
     "require-dev": {
-        "symfony/asset-mapper": "^6.3|^7.0",
-        "symfony/finder": "^5.4|^6.0|^7.0",
-        "symfony/framework-bundle": "^5.4|^6.0|^7.0",
-        "symfony/phpunit-bridge": "^5.4|^6.0|^7.0",
-        "symfony/twig-bundle": "^5.4|^6.0|^7.0",
-        "symfony/var-dumper": "^5.4|^6.0|^7.0"
+        "symfony/asset-mapper": "^6.3|^7.0|^8.0",
+        "symfony/finder": "^5.4|^6.0|^7.0|^8.0",
+        "symfony/framework-bundle": "^5.4|^6.0|^7.0|^8.0",
+        "symfony/phpunit-bridge": "^5.4|^6.0|^7.0|^8.0",
+        "symfony/twig-bundle": "^5.4|^6.0|^7.0|^8.0",
+        "symfony/var-dumper": "^5.4|^6.0|^7.0|^8.0"
     },
     "extra": {
         "thanks": {
diff --git a/src/Vue/src/DependencyInjection/VueExtension.php b/src/Vue/src/DependencyInjection/VueExtension.php
index f340b172c06..3d79b41f747 100644
--- a/src/Vue/src/DependencyInjection/VueExtension.php
+++ b/src/Vue/src/DependencyInjection/VueExtension.php
@@ -31,7 +31,7 @@
  */
 class VueExtension extends Extension implements PrependExtensionInterface, ConfigurationInterface
 {
-    public function load(array $configs, ContainerBuilder $container)
+    public function load(array $configs, ContainerBuilder $container): void
     {
         $configuration = $this->getConfiguration($configs, $container);
         $config = $this->processConfiguration($configuration, $configs);
@@ -53,7 +53,7 @@ public function load(array $configs, ContainerBuilder $container)
         ;
     }
 
-    public function prepend(ContainerBuilder $container)
+    public function prepend(ContainerBuilder $container): void
     {
         if (!$this->isAssetMapperAvailable($container)) {
             return;