diff --git a/action.yml b/action.yml
index df2fb32..08f9f00 100644
--- a/action.yml
+++ b/action.yml
@@ -21,7 +21,8 @@ runs:
   steps:
     - name: Checkout code
       uses: actions/checkout@v4
-
+      with:
+        ref: ${{ github.event.pull_request.head.ref }}
     - name: Check for .ruby-version file
       id: use_ruby_version_or_default
       shell: bash