diff --git a/aiogram/types/inline_keyboard.py b/aiogram/types/inline_keyboard.py
index dd3e92dd..16f0540a 100644
--- a/aiogram/types/inline_keyboard.py
+++ b/aiogram/types/inline_keyboard.py
@@ -14,8 +14,8 @@ class InlineKeyboardMarkup(base.TelegramObject):
 
     https://core.telegram.org/bots/api#inlinekeyboardmarkup
     """
-    inline_keyboard: typing.List[typing.List[InlineKeyboardButton]] = fields.ListOfLists(base=InlineKeyboardButton,
-                                                                                         default=[])
+    inline_keyboard: 'typing.List[typing.List[InlineKeyboardButton]]' = fields.ListOfLists(base='InlineKeyboardButton',
+                                                                                           default=[])
 
     @classmethod
     def create(cls, row_width=3):
diff --git a/aiogram/types/reply_keyboard.py b/aiogram/types/reply_keyboard.py
index d89439bb..ca77ffe5 100644
--- a/aiogram/types/reply_keyboard.py
+++ b/aiogram/types/reply_keyboard.py
@@ -10,12 +10,12 @@ class ReplyKeyboardMarkup(base.TelegramObject):
 
     https://core.telegram.org/bots/api#replykeyboardmarkup
     """
-    keyboard: typing.List[typing.List[KeyboardButton]] = fields.ListOfLists(base=KeyboardButton, default=[])
+    keyboard: 'typing.List[typing.List[KeyboardButton]]' = fields.ListOfLists(base='KeyboardButton', default=[])
     resize_keyboard: base.Boolean = fields.Field()
     one_time_keyboard: base.Boolean = fields.Field()
     selective: base.Boolean = fields.Field()
 
-    def __init__(self, keyboard: typing.List[typing.List[KeyboardButton]] = None,
+    def __init__(self, keyboard: 'typing.List[typing.List[KeyboardButton]]' = None,
                  resize_keyboard: base.Boolean = None,
                  one_time_keyboard: base.Boolean = None,
                  selective: base.Boolean = None):