diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 0828891..7034c78 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -4,6 +4,9 @@ on:
   pull_request:
     branches: [main]
 
+permissions:
+  contents: read
+
 concurrency:
   group: ci-${{ github.ref }}
   cancel-in-progress: true