diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 015565f..c090791 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -1,5 +1,8 @@
 name: CI
-on: push
+'on':
+  push:
+    branches: [master]
+  pull_request:
 
 jobs:
   build: