diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 18777da..5d29e4d 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -26,6 +26,9 @@ concurrency:
   group: ci-${{ github.ref }}
   cancel-in-progress: true
 
+permissions:
+  contents: read
+
 jobs:
   test:
     runs-on: ubuntu-latest