diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 3aa58c5..5c09f23 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -5,10 +5,14 @@ on:
     branches: [main]
   pull_request:
 
+permissions:
+  contents: read
+
 jobs:
   test:
     name: swift test (macOS)
     runs-on: macos-latest
+    timeout-minutes: 15
     steps:
       - uses: actions/checkout@v4
       - name: Build