diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 76fb583..27cd850 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -16,7 +16,7 @@ jobs:
     steps:
     - uses: actions/checkout@v7
     - name: Set up Ruby ${{ matrix.ruby-version }}
-      uses: ruby/setup-ruby@v1
+      uses: ruby/setup-ruby@v1.315.0
       with:
         ruby-version: ${{ matrix.ruby-version }}
         bundler-cache: true
@@ -33,7 +33,7 @@ jobs:
         uses: actions/checkout@v7
 
       - name: Set up Ruby
-        uses: ruby/setup-ruby@v1
+        uses: ruby/setup-ruby@v1.315.0
         with:
           bundler-cache: true