diff --git a/aiogram/bot/base.py b/aiogram/bot/base.py
index ee2e1af8..71e4effc 100644
--- a/aiogram/bot/base.py
+++ b/aiogram/bot/base.py
@@ -174,7 +174,7 @@ class BaseBot:
         finally:
             self._ctx_token.reset(token)
 
-    @deprecated("This method behaviour will be changed in aiogram v3.0. "
+    @deprecated("This method's behavior will be changed in aiogram v3.0. "
                 "More info: https://core.telegram.org/bots/api#close")
     async def close(self):
         """