diff --git a/src/infrastructure/database/unit_of_work.py b/src/infrastructure/database/unit_of_work.py
index 3e2363c..17ce98b 100644
--- a/src/infrastructure/database/unit_of_work.py
+++ b/src/infrastructure/database/unit_of_work.py
@@ -15,6 +15,8 @@ class UnitOfWork(IUnitOfWork):
         self._logger: ILogger = logger
 
     async def __aenter__(self):
+        self._user_repository = None
+        self._session_repository = None
         self._session = self.session_factory()
         return self