diff --git a/project_config.yaml b/project_config.yaml
index fcff903..94f97ed 100644
--- a/project_config.yaml
+++ b/project_config.yaml
@@ -1,5 +1,7 @@
 generator_args:
   owl:
+      add_root_classes: true
+      mixins_as_expressions: true
       metaclasses: false
       type_objects: false
-    
\ No newline at end of file
+