diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index b81466ff9..c8cab7975 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -30,7 +30,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: ruby/setup-ruby@v1
         with:
-          ruby-version: 3.2.1
+          ruby-version: 4.0.7
           bundler-cache: true
       - name: Run gem release
         run: bundle exec rake gem:release
diff --git a/Dockerfile.ruby b/Dockerfile.ruby
index 3569cc85d..838b1d807 100644
--- a/Dockerfile.ruby
+++ b/Dockerfile.ruby
@@ -1,4 +1,4 @@
-FROM ruby:3.2.1
+FROM ruby:4.0.7
 
 MAINTAINER Tomas Korcak <korczis@gmail.com>