diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 5a5e7629..638889e2 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -45,7 +45,7 @@ jobs:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
       - uses: ruby/setup-ruby@v1
         with:
-          ruby-version: "3.4"
+          ruby-version: "3.4.8"
       - run: bundle install
       - name: Standard
         run: bundle exec rake standard