diff --git a/.github/workflows/format-check.yml b/.github/workflows/format-check.yml
index 846e008..2db1a09 100644
--- a/.github/workflows/format-check.yml
+++ b/.github/workflows/format-check.yml
@@ -3,6 +3,9 @@ name: Code Format Check
 
 on: [push, pull_request]
 
+permissions:
+  contents: read
+
 jobs:
   formatting:
     runs-on: ubuntu-latest