diff --git a/backend/src/schemas.py b/backend/src/schemas.py
index e141a75..bd5f84b 100644
--- a/backend/src/schemas.py
+++ b/backend/src/schemas.py
@@ -1,7 +1,7 @@
 from datetime import datetime, timedelta
 from typing import Optional, Union
 
-from pydantic import BaseModel
+from pydantic import BaseModel, ConfigDict
 
 
 # Security