diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 54b793e5..4227916d 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -3,7 +3,13 @@
 
 name: build
 
-on: [push]
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
 
 jobs:
   lint: