diff --git a/README.md b/README.md
index 4491ed6..31def8a 100644
--- a/README.md
+++ b/README.md
@@ -163,6 +163,9 @@ jobs:
 
       - name: Deploy
         uses: peaceiris/actions-gh-pages@v3
+        # If you're changing the branch from main, 
+        # also change the `main` in `refs/heads/main` 
+        # below accordingly.
         if: ${{ github.ref == 'refs/heads/main' }}
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}