diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 7f14d78..39140a0 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -3,6 +3,9 @@ name: CI
 on:
   pull_request:
 
+permissions:
+  contents: read
+
 jobs:
   build-test:
     runs-on: ubuntu-latest