diff --git a/.github/workflows/action.yml b/.github/workflows/action.yml
index 0e6b79b7f..093586f31 100644
--- a/.github/workflows/action.yml
+++ b/.github/workflows/action.yml
@@ -31,6 +31,7 @@ jobs:
       run: cargo doc
     - name: Deploy
       uses: peaceiris/actions-gh-pages@v3
+      if: ${{ github.ref == 'refs/heads/master' }}
       with:
         github_token: ${{ secrets.GITHUB_TOKEN }}
         publish_dir: ./target/doc