diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 77f4257e..14153d21 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -14,7 +14,7 @@ jobs:
         uses: actions/checkout@main
 
       - name: Install Ruby
-        uses: ruby/setup-ruby@v1
+        uses: ruby/setup-ruby@70da3bbf44ac06db1b0547ce2acc9380a5270d1e # v1.175.0
         with:
           ruby-version: "2.7"
           bundler-cache: true