diff --git a/.github/workflows/reviewdog.yml b/.github/workflows/reviewdog.yml
index 6e5fce37ee9ed41..54127040e5168d4 100644
--- a/.github/workflows/reviewdog.yml
+++ b/.github/workflows/reviewdog.yml
@@ -5,6 +5,8 @@ on:
 
 jobs:
   prettier:
+    # do not run on forks
+    if: github.repository == 'mdn/content'
     name: prettier
     runs-on: ubuntu-latest
     steps: