diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index 36d260c5..7f7a4789 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -12,6 +12,7 @@ on:
         default: 'true'
 jobs:
   publish:
+    if: github.repository == "microsoft/monaco-editor"
     name: Publish to npm
     runs-on: ubuntu-latest
     steps: