diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 3dcafd31..fdd30213 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -15,7 +15,13 @@
 #
 
 name: CI
-on: [pull_request, push]
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
 
 jobs:
   build: