diff --git a/.github/workflows/check.yml b/.github/workflows/check.yml
index 5d7fa17..72277c4 100644
--- a/.github/workflows/check.yml
+++ b/.github/workflows/check.yml
@@ -4,7 +4,9 @@
 
 name: CI
 
-on: [pull_request]
+on:
+  pull_request:
+  branches: main
 
 jobs:
   validate: