diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 724ff0b..96cea58 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -1,7 +1,9 @@
 name: "Nix CI"
 on:
-  pull_request:
   push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
 jobs:
   build:
     runs-on: ubuntu-latest