diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 0d7b127..e515b1c 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -1,6 +1,9 @@
 name: build
 
-on: [push, pull_request]
+on: # yamllint disable-line rule:truthy
+  pull_request:
+  push:
+    branches: [main]
 
 jobs:
   lint: