diff --git a/app/routers/api_crud.py b/app/routers/api_crud.py
index 101057f..843f2b0 100644
--- a/app/routers/api_crud.py
+++ b/app/routers/api_crud.py
@@ -200,8 +200,8 @@ router = APIRouter()
 @router.get('/{obj_type_l1}/{obj_type_l2}/{obj_type_l3}/list')
 async def get_obj_li(
         obj_type_l1: str = Path(min_length=2, max_length=50),
-        obj_type_l2: str = Path(min_length=2, max_length=50),
-        obj_type_l3: str = Path(min_length=2, max_length=50),
+        obj_type_l2: Optional[str] = Path(min_length=2, max_length=50),
+        obj_type_l3: Optional[str] = Path(min_length=2, max_length=50),
 
         for_obj_type: Optional[str] = Query(None, max_length=50),
         for_obj_id: Optional[str] = Query(None, max_length=22),