diff --git a/packages/bookshop/srv/cat-service.cds b/packages/bookshop/srv/cat-service.cds
index 2c3bbc94..6b1ad122 100644
--- a/packages/bookshop/srv/cat-service.cds
+++ b/packages/bookshop/srv/cat-service.cds
@@ -12,8 +12,9 @@ service CatalogService {
     key AddressID,
     key BusinessPartner,
     StreetName,
-    CityName,
     HouseNumber,
+    CityName,
+    PostalCode,
     Country
   };