diff --git a/.github/workflows/license.yml b/.github/workflows/license.yml
index 1e8fb38..ffc5c60 100644
--- a/.github/workflows/license.yml
+++ b/.github/workflows/license.yml
@@ -2,6 +2,9 @@ name: License headers
 
 on: [ pull_request ]
 
+permissions:
+  contents: read
+
 jobs:
   build: