diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 84f9015..fbdbe4c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -26,7 +26,7 @@ jobs:
     steps:
     - uses: actions/checkout@v6
     - name: Set up Ruby
-      uses: ruby/setup-ruby@v1
+      uses: ruby/setup-ruby@v1.305.0
       with:
         ruby-version: ${{ matrix.ruby }}
         bundler-cache: true