diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 0c8a33c..8554ec0 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -1,7 +1,9 @@
 name: Build and test
 on:
-  - pull_request
-  - push
+  pull_request:
+  push:
+    branches:
+      - master
 
 jobs:
   build: