diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 56620b3..f14d70c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -16,7 +16,7 @@ jobs:
       - name: Setup ruby
         uses: ruby/setup-ruby@v1
         with:
-          ruby-version: '2.7'
+          ruby-version: '4.0.1'
           bundler-cache: true
       - name: Run rake validate
         run: bundle exec rake validate