diff --git a/.github/workflows/test.yaml b/.github/workflows/test.yaml
index af3638a..892ba21 100644
--- a/.github/workflows/test.yaml
+++ b/.github/workflows/test.yaml
@@ -30,7 +30,7 @@ jobs:
       fail-fast: false
       matrix:
         toolchain: [ gcc, llvm, intel ]
-        json_version: [ v3.11.2, v3.8.0 ]
+        json_version: [ develop, v3.12.0, v3.8.0 ]
         experimental: [ false ]
         include:
           - toolchain: llvm
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 39721bf..80dc756 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -1,6 +1,6 @@
 repos:
   - repo: https://github.com/Takishima/cmake-pre-commit-hooks
-    rev: v1.8.1
+    rev: v1.9.6
     hooks:
       - id: clang-format
         args:
@@ -15,19 +15,19 @@ repos:
           - 'pre-commit'
         stages: [ manual ]
   - repo: https://github.com/pre-commit/pre-commit-hooks
-    rev: v4.4.0
+    rev: v6.0.0
     hooks:
       - id: trailing-whitespace
       - id: end-of-file-fixer
       - id: check-yaml
   - repo: https://github.com/executablebooks/mdformat
-    rev: 0.7.16
+    rev: 0.7.22
     hooks:
       - id: mdformat
         additional_dependencies:
           - mdformat-gfm
           - mdformat-tables
   - repo: https://github.com/python-jsonschema/check-jsonschema
-    rev: 0.23.0
+    rev: 0.34.0
     hooks:
       - id: check-github-workflows
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8847ba3..e9df8a2 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -42,7 +42,7 @@ mark_as_advanced(JSON_VALIDATOR_TEST_COVERAGE)
 if (DEFINED ENV{NLOHMANN_JSON_VERSION})
     set(JSON_FETCH_VERSION_DEFAULT $ENV{NLOHMANN_JSON_VERSION})
 else ()
-    set(JSON_FETCH_VERSION_DEFAULT v3.11.2)
+    set(JSON_FETCH_VERSION_DEFAULT v3.12.0)
 endif ()
 set(JSON_FETCH_VERSION ${JSON_FETCH_VERSION_DEFAULT} CACHE STRING "Fetch nlohmann::json version")
 
diff --git a/src/smtp-address-validator.cpp b/src/smtp-address-validator.cpp
index 5ddd811..3b4a461 100644
--- a/src/smtp-address-validator.cpp
+++ b/src/smtp-address-validator.cpp
@@ -687,7 +687,7 @@ bool is_address(const char *p, const char *pe)
 		const signed char *_keys;
 		const signed char *_acts;
 		unsigned int _nacts;
-	_resume : {
+	_resume: {
 	}
 		if (p == pe && p != eof)
 			goto _out;
@@ -746,7 +746,7 @@ bool is_address(const char *p, const char *pe)
 				}
 			}
 
-		_match : {
+		_match: {
 		}
 		}
 		cs = (int) _address_cond_targs[_trans];
@@ -785,7 +785,7 @@ bool is_address(const char *p, const char *pe)
 				goto _resume;
 			}
 		}
-	_out : {
+	_out: {
 	}
 	}
 	return result;