diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 3dd4923..150d2e4 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -5,6 +5,9 @@ on:
     branches: [main]
   workflow_dispatch:
 
+permissions:
+  contents: read
+
 concurrency:
   group: ci-${{ github.ref }}
   cancel-in-progress: true