diff --git a/.github/workflows/build-documentation.yml b/.github/workflows/build-documentation.yml
index cc45178..1cd12fd 100644
--- a/.github/workflows/build-documentation.yml
+++ b/.github/workflows/build-documentation.yml
@@ -26,6 +26,7 @@ jobs:
         make -C docs/ html
         touch docs/_build/html/.nojekyll
     - name: Deploy 🚀
+      if: github.ref == "refs/heads/master"
       uses: JamesIves/github-pages-deploy-action@3.6.2
       with:
         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}