diff --git a/config/application.yml b/config/application.yml
index 6af004fe..5a3917cc 100644
--- a/config/application.yml
+++ b/config/application.yml
@@ -100,6 +100,8 @@ spring:
             uri: ${geonetwork.core.url}
             predicates:
               - Path=/geonetwork/**
+            filters:
+              - addSimpleGn4SecurityHeader=gn5.to.gn4.trusted.json.auth
   batch:
     jdbc:
       initialize-schema: always