diff --git a/.github/workflows/book.yml b/.github/workflows/book.yml
index 396981c95..0a12b40f4 100644
--- a/.github/workflows/book.yml
+++ b/.github/workflows/book.yml
@@ -41,7 +41,7 @@ jobs:
     name: Deploy
     runs-on: ubuntu-latest
     needs: book
-    if: github.event_name == 'push' && github.ref == 'refs/heads/master'
+    if: github.repository == 'salsa-rs/salsa' && github.event_name == 'push' && github.ref == 'refs/heads/master'
     concurrency:
       group: github-pages
       cancel-in-progress: true