diff --git a/.github/workflows/pr-playground-preview.yml b/.github/workflows/pr-playground-preview.yml
index 93d0af8..fdf00d3 100644
--- a/.github/workflows/pr-playground-preview.yml
+++ b/.github/workflows/pr-playground-preview.yml
@@ -11,6 +11,7 @@ permissions:
 
 jobs:
   preview:
+    if: github.event.pull_request.head.repo.full_name == github.repository
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository