diff --git a/.github/workflows/rubocop.yml b/.github/workflows/rubocop.yml
index 80fe9d6..06d8bfa 100644
--- a/.github/workflows/rubocop.yml
+++ b/.github/workflows/rubocop.yml
@@ -1,6 +1,10 @@
 name: Ruby
 
-on: [push, pull_request]
+on:
+  push:
+    branches:
+      - main
+  pull_request:
 
 jobs:
   rubocop: