diff --git a/.github/workflows/default.yml b/.github/workflows/default.yml
index 22248c0..406c565 100644
--- a/.github/workflows/default.yml
+++ b/.github/workflows/default.yml
@@ -25,7 +25,7 @@ jobs:
         with:
           fetch-depth: 0
 
-      - uses: ruby/setup-ruby@v1
+      - uses: ruby/setup-ruby@0cb964fd540e0a24c900370abf38a33466142735 # v1.305.0
         with:
           bundler-cache: true
         env: