diff --git a/.github/workflows/format.yml b/.github/workflows/format.yml
index 8d3a2ec..f1b0d79 100644
--- a/.github/workflows/format.yml
+++ b/.github/workflows/format.yml
@@ -6,6 +6,9 @@ on:
   pull_request:
     branches: [main]
 
+permissions:
+  contents: read
+
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true