diff --git a/.github/workflows/custom-action.yml b/.github/workflows/custom-action.yml
index 7a87b53f1..717cf59fa 100644
--- a/.github/workflows/custom-action.yml
+++ b/.github/workflows/custom-action.yml
@@ -1,5 +1,8 @@
 on: [push]
 
+permissions:
+  contents: read
+
 jobs:
   my-job:
     runs-on: ubuntu-latest