diff --git a/.github/workflows/unit-test.yml b/.github/workflows/unit-test.yml
index 0d61656c..b46a5160 100644
--- a/.github/workflows/unit-test.yml
+++ b/.github/workflows/unit-test.yml
@@ -38,6 +38,7 @@ jobs:
         path: extras/test/unit/lcov.report
 
     - name: Deploy to GitHub Pages
+      if: github.ref == 'refs/heads/master'
       uses: peaceiris/actions-gh-pages@v3
       with:
         github_token: ${{ secrets.GITHUB_TOKEN }}