diff --git a/.github/workflows/e2e_test_preference_based_routing.yml b/.github/workflows/e2e_test_preference_based_routing.yml
index 48aaffcc..4602f09c 100644
--- a/.github/workflows/e2e_test_preference_based_routing.yml
+++ b/.github/workflows/e2e_test_preference_based_routing.yml
@@ -1,5 +1,8 @@
 name: e2e demo preference based routing tests
 
+permissions:
+  contents: read
+
 on:
   push:
     branches: