diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 70b6fa3..0c46d9c 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -56,7 +56,7 @@ jobs:
       - uses: actions/checkout@master
       - uses: ruby/setup-ruby@v1
         with:
-          ruby-version: "3.4.8"
+          ruby-version: "4.0.0"
           bundler-cache: true
         env:
           BUNDLE_WITHOUT: development