diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 868d982..43b3658 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -2,11 +2,9 @@ name: CI
 
 on:
   push:
-    branches:
-      - master
+    branches: [ master ]
   pull_request:
-    branches:
-      - master
+    branches: [ master ]
 
 jobs:
   test: