diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 02bd3ca..56c2baa 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -6,6 +6,9 @@ on:
   pull_request:
     branches: [ main ]
 
+permissions:
+  contents: read
+
 jobs:
   check:
     runs-on: ubuntu-latest