diff --git a/.github/workflows/checklist.yml b/.github/workflows/checklist.yml
index 65e640a2a0e4..13f52a4a87b8 100644
--- a/.github/workflows/checklist.yml
+++ b/.github/workflows/checklist.yml
@@ -5,6 +5,7 @@ name: Checklist
 
 on:
   pull_request_target:
+    branches: [ main ]
     types: [ opened, reopened, edited, synchronize ]
 
 permissions: