diff --git a/.github/workflows/ruby.yml b/.github/workflows/ruby.yml
index 26cdcc9..52bfb93 100644
--- a/.github/workflows/ruby.yml
+++ b/.github/workflows/ruby.yml
@@ -22,7 +22,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        ruby-version: ['2.7', '3.0', '3.1', '3.2', '3.3']
+        ruby-version: ['2.7', '3.0', '3.1', '3.2', '3.3', '3.4']
 
     steps:
     - uses: actions/checkout@v3
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 655b067..3e1df21 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,7 +11,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - LICENSE file.
 - Code of Conduct.
-- Add support for Ruby 3.2 and 3.3 (no changes).
+- Add support for Ruby 3.2, 3.3, 3.4 (no changes).
 
 ### Fixed