diff --git a/CHANGELOG.md b/CHANGELOG.md
index 274b4c0..b0545ee 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Unreleased
 
+# 0.16.8
+
+- Update to Bot API 9.0
+
 # 0.16.7
 
 - Update to Bot API 8.2
diff --git a/lib/telegram/bot/client/api_methods.txt b/lib/telegram/bot/client/api_methods.txt
index bad7272..aab059c 100644
--- a/lib/telegram/bot/client/api_methods.txt
+++ b/lib/telegram/bot/client/api_methods.txt
@@ -1,5 +1,5 @@
 # Generated with bin/fetch-telegram-methods
-# Bot API 8.2
+# Bot API 9.0
 
 getUpdates
 setWebhook
@@ -102,6 +102,30 @@ editMessageReplyMarkup
 stopPoll
 deleteMessage
 deleteMessages
+getAvailableGifts
+sendGift
+giftPremiumSubscription
+verifyUser
+verifyChat
+removeUserVerification
+removeChatVerification
+readBusinessMessage
+deleteBusinessMessages
+setBusinessAccountName
+setBusinessAccountUsername
+setBusinessAccountBio
+setBusinessAccountProfilePhoto
+removeBusinessAccountProfilePhoto
+setBusinessAccountGiftSettings
+getBusinessAccountStarBalance
+transferBusinessAccountStars
+getBusinessAccountGifts
+convertGiftToStars
+upgradeGift
+transferGift
+postStory
+editStory
+deleteStory
 
 sendSticker
 getStickerSet
@@ -119,12 +143,6 @@ setStickerSetTitle
 setStickerSetThumbnail
 setCustomEmojiStickerSetThumbnail
 deleteStickerSet
-getAvailableGifts
-sendGift
-verifyUser
-verifyChat
-removeUserVerification
-removeChatVerification
 
 answerInlineQuery
 answerWebAppQuery
diff --git a/lib/telegram/bot/client/request_body_formatter.rb b/lib/telegram/bot/client/request_body_formatter.rb
index bcae116..a4f20b4 100644
--- a/lib/telegram/bot/client/request_body_formatter.rb
+++ b/lib/telegram/bot/client/request_body_formatter.rb
@@ -13,22 +13,25 @@ module RequestBodyFormatter
 
         def format(body, action)
           body = body.dup
-          case action.to_s
-          when 'sendMediaGroup'
-            extract_files_from_array!(body, :media)
-          when 'editMessageMedia'
-            replace_field(body, :media) do |value|
-              files = {}
-              extract_files_from_hash(value, files).tap { body.merge!(files) }
-            end
-          end
-          body.each do |key, val|
-            body[key] = val.to_json if val.is_a?(Hash) || val.is_a?(Array)
-          end
+          handlers = {
+            'sendMediaGroup' => -> { extract_files_from_array!(body, :media) },
+            'editMessageMedia' => -> { extract_and_merge!(body, :media) },
+            'postStory' => -> { extract_and_merge!(body, :content) },
+          }
+          handlers[action.to_s]&.call
+
+          body.transform_values! { |v| v.is_a?(Hash) || v.is_a?(Array) ? v.to_json : v }
         end
 
         private
 
+        def extract_and_merge!(body, field)
+          replace_field(body, field) do |value|
+            files = {}
+            extract_files_from_hash(value, files).tap { body.merge!(files) }
+          end
+        end
+
         # Detects field by symbol or string name and replaces it with mapped value.
         def replace_field(hash, field_name)
           field_name = [field_name.to_sym, field_name.to_s].find { |x| hash.key?(x) }
diff --git a/lib/telegram/bot/updates_controller.rb b/lib/telegram/bot/updates_controller.rb
index 628c2c8..340f0fd 100644
--- a/lib/telegram/bot/updates_controller.rb
+++ b/lib/telegram/bot/updates_controller.rb
@@ -1,5 +1,6 @@
 # frozen_string_literal: true
 
+require 'logger'
 require 'abstract_controller'
 require 'active_support/core_ext/string/inflections'
 require 'active_support/callbacks'
diff --git a/lib/telegram/bot/updates_controller/payload_types.txt b/lib/telegram/bot/updates_controller/payload_types.txt
index b52f5cc..2c68883 100644
--- a/lib/telegram/bot/updates_controller/payload_types.txt
+++ b/lib/telegram/bot/updates_controller/payload_types.txt
@@ -1,5 +1,5 @@
 # Generated with bin/fetch-telegram-methods
-# Bot API 8.2
+# Bot API 9.0
 message
 edited_message
 channel_post
diff --git a/lib/telegram/bot/version.rb b/lib/telegram/bot/version.rb
index 06d8d9e..576c9da 100644
--- a/lib/telegram/bot/version.rb
+++ b/lib/telegram/bot/version.rb
@@ -2,7 +2,7 @@
 
 module Telegram
   module Bot
-    VERSION = '0.16.7'
+    VERSION = '0.16.8'
 
     def self.gem_version
       Gem::Version.new VERSION
diff --git a/spec/telegram/bot/client/request_body_formatter_spec.rb b/spec/telegram/bot/client/request_body_formatter_spec.rb
index 35f5134..e72d39a 100644
--- a/spec/telegram/bot/client/request_body_formatter_spec.rb
+++ b/spec/telegram/bot/client/request_body_formatter_spec.rb
@@ -90,5 +90,35 @@
         it { should eq input }
       end
     end
+
+    context 'with postStory action' do
+      let(:action) { :postStory }
+      let(:input) { {content: {a: file, b: 123}, x: 789} }
+      let(:file) { File.new(__FILE__) }
+
+      it 'extracts files to the top-level' do
+        should eq(
+          content: {a: 'attach://_file0', b: 123}.to_json,
+          x: 789,
+          '_file0' => file,
+        )
+      end
+
+      context 'and input has string keys' do
+        let(:input) { super().stringify_keys }
+        it 'extracts files to the top-level' do
+          should eq(
+            'content' => {a: 'attach://_file0', b: 123}.to_json,
+            'x' => 789,
+            '_file0' => file,
+          )
+        end
+      end
+
+      context 'without content' do
+        let(:input) { {a: 1, b: '2', c: nil} }
+        it { should eq input }
+      end
+    end
   end
 end