diff --git a/.github/workflows/github-pages.yml b/.github/workflows/github-pages.yml
index 481f6952..d7bccb39 100644
--- a/.github/workflows/github-pages.yml
+++ b/.github/workflows/github-pages.yml
@@ -14,7 +14,7 @@ jobs:
       run: yarn run build
 
     - name: Deploy
-      if: github.ref == 'master'
+      if: github.ref == 'refs/heads/master'
       uses: peaceiris/actions-gh-pages@v2.2.0
       env:
         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}