diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 9d3978b..7a12728 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -1,7 +1,11 @@
 ---
 name: build
 
-on: push
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
 
 concurrency:
   group: build-${{ github.ref }}