diff --git a/.github/workflows/sync-plugin-manager.yml b/.github/workflows/sync-plugin-manager.yml
index a4aab7338d..c2a02be27c 100644
--- a/.github/workflows/sync-plugin-manager.yml
+++ b/.github/workflows/sync-plugin-manager.yml
@@ -9,6 +9,7 @@ on:
 jobs:
   build:
     runs-on: ubuntu-latest
+    if: github.repository_owner == 'jenkinsci'
     steps:
       - name: Check out source code
         uses: actions/checkout@v4