diff --git a/.github/workflows/build-and-deploy.yml b/.github/workflows/build-and-deploy.yml
index 80c97162..f35dceac 100644
--- a/.github/workflows/build-and-deploy.yml
+++ b/.github/workflows/build-and-deploy.yml
@@ -70,7 +70,7 @@ jobs:
   deploy:
     name: Deploy to GitHub pages
     # Do not run this unless *pushing* to `master`.
-    if: github.event_name == 'push' && github.ref == 'refs/heads/master'
+    if: github.event_name == 'push' && github.ref == 'refs/heads/master' && github.repository == 'gbdev/gb-asm-tutorial'
     environment:
       name: github-pages
       url: ${{ steps.deployment.outputs.page_url }}
@@ -79,4 +79,4 @@ jobs:
     steps:
       - name: Deploy to GitHub Pages
         id: deployment
-        uses: actions/deploy-pages@v4
+        uses: actions/deploy-pages@v4
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