diff --git a/.github/workflows/gems-bump-version.yml b/.github/workflows/gems-bump-version.yml
index 85d991457032..46db43a83e1d 100644
--- a/.github/workflows/gems-bump-version.yml
+++ b/.github/workflows/gems-bump-version.yml
@@ -25,7 +25,7 @@ jobs:
       - uses: actions/checkout@v3
         with:
           token: ${{ steps.generate_token.outputs.token }}
-          ref: HEAD
+          ref: "main"
           # fetch-depth: 0 # DEBUG
 
       - uses: ruby/setup-ruby@v1 # bump-version.rb needs bundler