diff --git a/builtin.aqua b/builtin.aqua
index 5d3646a..9694c89 100644
--- a/builtin.aqua
+++ b/builtin.aqua
@@ -20,6 +20,7 @@ data Service:
     blueprint_id: string
     owner_id: string
     aliases: []string
+    worker_aliases: []string
     worker_id: string
 
 data FunctionSignature:
@@ -253,7 +254,7 @@ service Srv("srv"):
     -- on the node specified in the service call
     -- Argument: service_id – ID of the service whose interface you want to retrieve.
     get_interface(service_id: string) -> Interface
-    
+
     -- Retrieves information about service
     -- Argument: service_id – ID or alias of the service
     info(service_id: string) -> Service
@@ -310,7 +311,7 @@ service Dist("dist"):
     -- Used to get the blueprints available on the node specified in the service call.
     -- A blueprint is an object of the following structure
     list_blueprints() -> []Blueprint
-    
+
     -- Get a single blueprint
     get_blueprint(blueprint_id: string) -> Blueprint