diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index b5450a4..1638819 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -16,7 +16,7 @@ permissions:
 jobs:
   build:
     name: Build
-    if: ${{ github.event.pull_request.merged }}
+    if: ${{ github.event.pull_request.merged && github.event.pull_request.head.repo.full_name == github.repository }}
     runs-on: ubuntu-latest
 
     permissions: