diff --git a/.github/workflows/ruby.yml b/.github/workflows/ruby.yml
index b1b7735..1514f65 100644
--- a/.github/workflows/ruby.yml
+++ b/.github/workflows/ruby.yml
@@ -6,7 +6,7 @@ jobs:
     continue-on-error: ${{ matrix.allow-failures }}
     strategy:
       matrix:
-        ruby: ['3.3']
+        ruby: ['3.4']
         allow-failures: [false]
         include:
           - ruby: head
diff --git a/.rubocop.yml b/.rubocop.yml
index bfd9656..8e72bf4 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -6,4 +6,4 @@ inherit_from: .rubocop_todo.yml
 
 AllCops:
   NewCops: enable
-  TargetRubyVersion: 3.3
+  TargetRubyVersion: 3.4
diff --git a/.rubocop_todo.yml b/.rubocop_todo.yml
index 99fa3cd..59b3e50 100644
--- a/.rubocop_todo.yml
+++ b/.rubocop_todo.yml
@@ -1,6 +1,6 @@
 # This configuration was generated by
 # `rubocop --auto-gen-config`
-# on 2023-12-28 20:22:26 UTC using RuboCop version 1.59.0.
+# on 2024-12-27 08:28:12 UTC using RuboCop version 1.69.2.
 # The point is for the user to remove these configuration records
 # one by one as the offenses are removed from the code base.
 # Note that changes in the inspected code, or installation of new
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 323549e..cb527da 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,7 +4,7 @@
 
 ### New Features
 
-* Move application to `ruby-3.3`
+* Move application to `ruby-3.4`
 * Add `dependabot` support for Docker base image
 * Send all messages in queue instantly
   (Fix [#24](https://github.com/ONLYOFFICE-QA/redis-to-telegram/issues/24))
diff --git a/Gemfile b/Gemfile
index c9f93f9..b479c40 100644
--- a/Gemfile
+++ b/Gemfile
@@ -2,6 +2,8 @@
 
 source 'https://rubygems.org'
 
+ruby '>= 3.4.0'
+
 gem 'redis'
 gem 'telegram-bot-ruby'
 
diff --git a/Gemfile.lock b/Gemfile.lock
index cb919cc..3562704 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -123,5 +123,8 @@ DEPENDENCIES
   simplecov
   telegram-bot-ruby
 
+RUBY VERSION
+   ruby 3.4.1p0
+
 BUNDLED WITH
-   2.5.3
+   2.6.2