diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index cf3d221..d933edf 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -52,6 +52,6 @@ jobs:
       - uses: actions/checkout@master
       - uses: ruby/setup-ruby@v1
         with:
-          ruby-version: "3.4.8"
+          ruby-version: "4.0.0"
           bundler-cache: true
       - run: bundle exec rubocop --format github --format progress --parallel --color