diff --git a/aiogram/types/user.py b/aiogram/types/user.py
index 5822d6d1..247bae09 100644
--- a/aiogram/types/user.py
+++ b/aiogram/types/user.py
@@ -55,7 +55,7 @@ class User(Deserializable):
         return self.full_name
 
     @property
-    def locale(self) -> babel.core.Locale or None:
+    def locale(self) -> 'babel.core.Locale' or None:
         """
         This property require `Babel <https://pypi.python.org/pypi/Babel>`_ module