diff --git a/.github/workflows/cost-center-sync-cached.yml b/.github/workflows/cost-center-sync-cached.yml
index 22a273c..184fdc7 100644
--- a/.github/workflows/cost-center-sync-cached.yml
+++ b/.github/workflows/cost-center-sync-cached.yml
@@ -20,6 +20,9 @@ on:
         default: false
         type: boolean
 
+permissions:
+  contents: read
+
 jobs:
   sync-cost-centers:
     runs-on: ubuntu-latest