diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index b037e35..79e3875 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -18,7 +18,7 @@ jobs:
     - name: Setup Ruby and install rubocop
       uses: ruby/setup-ruby@v1
       with:
-        ruby-version: 3.4
+        ruby-version: 3.3
         bundler-cache: true
     - name: Run rubocop
       run: bundle exec rubocop --parallel
@@ -30,7 +30,7 @@ jobs:
     - name: Set up Ruby and install gems
       uses: ruby/setup-ruby@v1
       with:
-        ruby-version: 3.4
+        ruby-version: 3.3
         bundler-cache: true
     - name: Run tests
       run: rake test