diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e9a4cbd5..73b60428 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -1,6 +1,12 @@
 name: Python package
 
-on: [push]
+on:
+  push:
+    branches:
+    - master
+  pull_request:
+    branches:
+    - master
 
 jobs:
   build: