diff --git a/.github/workflows/check-duplicates.yml b/.github/workflows/check-duplicates.yml
index cc0e7a3..2a36b31 100644
--- a/.github/workflows/check-duplicates.yml
+++ b/.github/workflows/check-duplicates.yml
@@ -2,6 +2,8 @@ name: Check Duplicates
 
 on:
   pull_request:
+    branches:
+      - main
   push:
     branches:
       - main