diff --git a/.github/workflows/metadata-label-commenter.yaml b/.github/workflows/metadata-label-commenter.yaml
index 168a041a..096b29cf 100644
--- a/.github/workflows/metadata-label-commenter.yaml
+++ b/.github/workflows/metadata-label-commenter.yaml
@@ -25,7 +25,7 @@ jobs:
       - uses: actions/checkout@v3
         with:
           token: ${{ secrets.BOT_TOKEN }}
-          ref: master
+          ref: main
 
       - uses: peaceiris/actions-label-commenter@v1
         with: