diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 8b77374..e863f1a 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -56,7 +56,7 @@ jobs:
     - name: Set up Ruby
       uses: ruby/setup-ruby@v1
       with:
-        ruby-version: '4.0.2'
+        ruby-version: '4.0.4'
         bundler-cache: true
     - run: bundle exec rake rubocop
     - run: bundle exec rake steep