diff --git a/.github/workflows/default.yml b/.github/workflows/default.yml
index 0f01481..d3c8010 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@319994f95fa847cf3fb3cd3dbe89f6dcde9f178f
         with:
           bundler-cache: true
         env: