diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 77cdfa1..27471cc 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -1,5 +1,9 @@
 name: Github Actions
-on: [push, pull_request]
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
 jobs:
   build:
     strategy: