diff --git a/aiogram/types/__init__.py b/aiogram/types/__init__.py
index e4e27e1a..35461bb9 100644
--- a/aiogram/types/__init__.py
+++ b/aiogram/types/__init__.py
@@ -45,7 +45,7 @@ from .passport_element_error import PassportElementError, PassportElementErrorDa
     PassportElementErrorSelfie
 from .passport_file import PassportFile
 from .photo_size import PhotoSize
-from .poll import PollOption, Poll, PollAnswer
+from .poll import PollOption, Poll, PollAnswer, PollType
 from .pre_checkout_query import PreCheckoutQuery
 from .reply_keyboard import KeyboardButton, ReplyKeyboardMarkup, ReplyKeyboardRemove, KeyboardButtonPollType
 from .response_parameters import ResponseParameters
@@ -150,6 +150,7 @@ __all__ = (
     'Poll',
     'PollAnswer',
     'PollOption',
+    'PollType',
     'PreCheckoutQuery',
     'ReplyKeyboardMarkup',
     'ReplyKeyboardRemove',
diff --git a/aiogram/types/poll.py b/aiogram/types/poll.py
index e5a485d4..86b41d7e 100644
--- a/aiogram/types/poll.py
+++ b/aiogram/types/poll.py
@@ -1,7 +1,7 @@
 import typing
 
-from . import base
-from . import fields
+from ..utils import helper
+from . import base, fields
 from .user import User
 
 
@@ -11,6 +11,7 @@ class PollOption(base.TelegramObject):
 
     https://core.telegram.org/bots/api#polloption
     """
+
     text: base.String = fields.Field()
     voter_count: base.Integer = fields.Field()
 
@@ -21,6 +22,7 @@ class PollAnswer(base.TelegramObject):
     
     https://core.telegram.org/bots/api#pollanswer
     """
+
     poll_id: base.String = fields.Field()
     user: User = fields.Field(base=User)
     option_ids: typing.List[base.Integer] = fields.ListField()
@@ -32,6 +34,7 @@ class Poll(base.TelegramObject):
     
     https://core.telegram.org/bots/api#poll
     """
+
     id: base.String = fields.Field()
     question: base.String = fields.Field()
     options: typing.List[PollOption] = fields.ListField(base=PollOption)
@@ -41,3 +44,10 @@ class Poll(base.TelegramObject):
     type: base.String = fields.Field()
     allows_multiple_answers: base.Boolean = fields.Field()
     correct_option_id: base.Integer = fields.Field()
+
+
+class PollType(helper.Helper):
+    mode = helper.HelperMode.snake_case
+
+    REGULAR = helper.Item()
+    QUIZ = helper.Item()
diff --git a/aiogram/types/reply_keyboard.py b/aiogram/types/reply_keyboard.py
index 6aa4ad24..ced20417 100644
--- a/aiogram/types/reply_keyboard.py
+++ b/aiogram/types/reply_keyboard.py
@@ -12,7 +12,7 @@ class KeyboardButtonPollType(base.TelegramObject):
     """
     type: base.String = fields.Field()
 
-    def __init__(self, type: base.String):
+    def __init__(self, type: typing.Optional[base.String] = None):
         super(KeyboardButtonPollType, self).__init__(type=type)