diff --git a/.github/workflows/do_not_merge.yml b/.github/workflows/do_not_merge.yml
index 4f420b1..17038fb 100644
--- a/.github/workflows/do_not_merge.yml
+++ b/.github/workflows/do_not_merge.yml
@@ -4,6 +4,9 @@ on:
   pull_request:
     types: [opened, reopened, labeled, unlabeled, synchronize, edited, ready_for_review]
 
+permissions:
+  contents: read
+
 jobs:
   block:
     name: Block if do not merge