diff --git a/aiogram/__init__.py b/aiogram/__init__.py
index 03743dd0..5f32025b 100644
--- a/aiogram/__init__.py
+++ b/aiogram/__init__.py
@@ -2,9 +2,9 @@ from .bot import Bot
 
 
 major_version = 0
-minor_version = 2
-build_type = 'b'
-build_number = 1
+minor_version = 3
+build_type = ''
+build_number = ''
 
 
 __version__ = f"{major_version}.{minor_version}{build_type}{build_number}"
diff --git a/aiogram/bot/api.py b/aiogram/bot/api.py
index 2ed3f0d4..ab3ce22a 100644
--- a/aiogram/bot/api.py
+++ b/aiogram/bot/api.py
@@ -4,6 +4,7 @@ import os
 import aiohttp
 
 from ..exceptions import ValidationError, TelegramAPIError
+from ..utils import json
 
 log = logging.getLogger('aiogram')
 
@@ -40,7 +41,7 @@ async def _check_result(method_name, response):
         raise TelegramAPIError(f"The server returned HTTP {response.status}. Response body:\n[{body}]",
                                method_name, response.status, body)
 
-    result_json = await response.json()
+    result_json = await response.json(loads=json.loads)
 
     if not result_json.get('ok'):
         body = await response.text()
@@ -83,7 +84,7 @@ def _compose_data(params, files=None):
 async def request(session, token, method, data=None, files=None):
     log.debug(f"Make request: '{method}' with data: {data or {}} and files {files or {}}")
     data = _compose_data(data, files)
-    url = API_URL.format(token=token, method=method)
+    url = Methods.api_url(token=token, method=method)
     async with session.post(url, data=data) as response:
         return await _check_result(method, response)
 
@@ -122,6 +123,15 @@ class Methods:
     GET_CHAT_ADMINISTRATORS = 'getChatAdministrators'
     GET_CHAT_MEMBERS_COUNT = 'getChatMembersCount'
     GET_CHAT_MEMBER = 'getChatMember'
+    RESTRICT_CHAT_MEMBER = 'restrictChatMember'
+    PROMOTE_CHAT_MEMBER = 'promoteChatMember'
+    EXPORT_CHAT_INVITE_LINK = 'exportChatInviteLink'
+    SET_CHAT_PHOTO = 'setChatPhoto'
+    DELETE_CHAT_PHOTO = 'deleteChatPhoto'
+    SET_CHAT_TITLE = 'setChatTitle'
+    SET_CHAT_DESCRIPTION = 'setChatDescription'
+    PIN_CHAT_MESSAGE = 'pinChatMessage'
+    UNPIN_CHAT_MESSAGE = 'unpinChatMessage'
     ANSWER_CALLBACK_QUERY = 'answerCallbackQuery'
     ANSWER_INLINE_QUERY = 'answerInlineQuery'
     EDIT_MESSAGE_TEXT = 'editMessageText'
@@ -134,3 +144,11 @@ class Methods:
     SEND_GAME = 'sendGame'
     SET_GAME_SCORE = 'setGameScore'
     GET_GAME_HIGH_SCORES = 'getGameHighScores'
+
+    @staticmethod
+    def api_url(token, method):
+        return API_URL.format(token=token, method=method)
+
+    @staticmethod
+    def file_url(token, path):
+        return FILE_URL.format(token=token, path=path)
diff --git a/aiogram/bot/bot.py b/aiogram/bot/bot.py
index 6ea9cc1f..7ec80d5e 100644
--- a/aiogram/bot/bot.py
+++ b/aiogram/bot/bot.py
@@ -1,4 +1,6 @@
-import json
+import datetime
+from ..utils import json
+import time
 
 from .base import BaseBot
 from .. import types
@@ -505,7 +507,7 @@ class Bot(BaseBot):
         file = await super(Bot, self).get_file(file_id)
         return self.prepare_object(types.File.de_json(file))
 
-    async def kick_chat_user(self, chat_id, user_id) -> bool:
+    async def kick_chat_member(self, chat_id, user_id) -> bool:
         """
         Use this method to kick a user from a group or a supergroup. In the case of supergroups, 
         the user will not be able to return to the group on their own using invite links, etc., 
@@ -515,7 +517,133 @@ class Bot(BaseBot):
         :param user_id: int
         :return: bool
         """
-        return await super(Bot, self).kick_chat_user(chat_id, user_id)
+        return await super(Bot, self).kick_chat_member(chat_id, user_id)
+
+    async def promote_chat_member(self, chat_id: int, user_id: int, can_change_info: bool, can_post_messages: bool,
+                                  can_edit_messages: bool, can_delete_messages: bool, can_invite_users: bool,
+                                  can_restrict_members: bool, can_pin_messages: bool,
+                                  can_promote_members: bool) -> bool:
+        """
+        Use this method to promote or demote a user in a supergroup or a channel.
+        The bot must be an administrator in the chat for this to work and must have the appropriate admin rights.
+        Pass False for all boolean parameters to demote a user.
+        
+        :param chat_id: int
+        :param user_id: int
+        :param can_change_info: bool 
+        :param can_post_messages: bool
+        :param can_edit_messages: bool
+        :param can_delete_messages: bool
+        :param can_invite_users: bool
+        :param can_restrict_members: bool
+        :param can_pin_messages: bool
+        :param can_promote_members: bool
+        :return: bool
+        """
+        return await super(Bot, self).promote_chat_member(chat_id, user_id, can_change_info, can_post_messages,
+                                                          can_edit_messages, can_delete_messages, can_invite_users,
+                                                          can_restrict_members, can_pin_messages, can_promote_members)
+
+    async def restrict_chat_member(self, chat_id: int, user_id: int, until_date: int, can_send_messages: bool,
+                                   can_send_media_messages: bool, can_send_other_messages: bool,
+                                   can_add_web_page_previews: bool) -> bool:
+        """
+        Use this method to restrict a user in a supergroup.
+        The bot must be an administrator in the supergroup for this to work and must have the appropriate admin rights.
+        Pass True for all boolean parameters to lift restrictions from a user.
+        
+        :param chat_id: int
+        :param user_id: int
+        :param until_date: int
+        :param can_send_messages: bool
+        :param can_send_media_messages: bool
+        :param can_send_other_messages: bool
+        :param can_add_web_page_previews: bool
+        :return: bool
+        """
+        if isinstance(until_date, datetime.datetime):
+            until_date = int(time.mktime(until_date.timetuple()))
+        return await super(Bot, self).restrict_chat_member(chat_id, user_id, until_date, can_send_messages,
+                                                           can_send_media_messages, can_send_other_messages,
+                                                           can_add_web_page_previews)
+
+    async def export_chat_invite_link(self, chat_id: int) -> str:
+        """
+        Use this method to export an invite link to a supergroup or a channel. 
+        The bot must be an administrator in the chat for this to work and must have the appropriate admin rights.
+        
+        :param chat_id: int
+        :return: 
+        """
+        return await super(Bot, self).export_chat_invite_link(chat_id)
+
+    async def set_chat_photo(self, chat_id: int, photo) -> bool:
+        """
+        Use this method to set a new profile photo for the chat.
+        Photos can't be changed for private chats.
+        The bot must be an administrator in the chat for this to work and must have the appropriate admin rights.
+        
+        :param chat_id: int
+        :param photo: file or str
+        :return: bool
+        """
+        return await super(Bot, self).set_chat_photo(chat_id, photo)
+
+    async def delete_chat_photo(self, chat_id: int) -> bool:
+        """
+        Use this method to delete a chat photo. 
+        Photos can't be changed for private chats. 
+        The bot must be an administrator in the chat for this to work and must have the appropriate admin rights. 
+        
+        :param chat_id: int
+        :return: bool
+        """
+        return await super(Bot, self).delete_chat_photo(chat_id)
+
+    async def set_chat_title(self, chat_id: int, title: str) -> bool:
+        """
+        Use this method to change the title of a chat. 
+        Titles can't be changed for private chats. 
+        The bot must be an administrator in the chat for this to work and must have the appropriate admin rights.
+        
+        :param chat_id: int
+        :param title: str
+        :return: bool
+        """
+        return await super(Bot, self).set_chat_title(chat_id, title)
+
+    async def set_chat_description(self, chat_id: int, description: str) -> bool:
+        """
+        Use this method to change the description of a supergroup or a channel. 
+        The bot must be an administrator in the chat for this to work and must have the appropriate admin rights.
+        
+        :param chat_id: int
+        :param description: str 
+        :return: bool
+        """
+        return await super(Bot, self).set_chat_description(chat_id, description)
+
+    async def pin_chat_message(self, chat_id: int, message_id: int, disable_notification: bool = False) -> bool:
+        """
+        Use this method to pin a message in a supergroup. 
+        The bot must be an administrator in the chat for this to work and must have the appropriate admin rights.
+        
+        :param chat_id: int
+        :param message_id: int
+        :param disable_notification: bool 
+        :return: bool
+        """
+        return await super(Bot, self).pin_chat_message(chat_id, message_id, disable_notification)
+
+    async def unpin_chat_message(self, chat_id: int) -> bool:
+        """
+        Use this method to unpin a message in a supergroup chat. 
+        The bot must be an administrator in the chat for this to work and must have the appropriate admin rights.
+    
+        :param chat_id: int
+        :return: bool
+        """
+        return await super(Bot, self).unpin_chat_message(chat_id)
 
     async def unban_chat_member(self, chat_id, user_id) -> bool:
         """
diff --git a/aiogram/dispatcher/__init__.py b/aiogram/dispatcher/__init__.py
index 6156c790..5254fb87 100644
--- a/aiogram/dispatcher/__init__.py
+++ b/aiogram/dispatcher/__init__.py
@@ -12,7 +12,7 @@ log = logging.getLogger(__name__)
 
 class Dispatcher:
     def __init__(self, bot, loop=None):
-        self.bot: Bot = bot
+        self.bot: 'Bot' = bot
         if loop is None:
             loop = self.bot.loop
 
diff --git a/aiogram/types/__init__.py b/aiogram/types/__init__.py
index c43b3bc8..bb3ac230 100644
--- a/aiogram/types/__init__.py
+++ b/aiogram/types/__init__.py
@@ -3,6 +3,7 @@ from .audio import Audio
 from .callback_query import CallbackQuery
 from .chat import Chat, ChatType, ChatActions
 from .chat_member import ChatMember, ChatMemberStatus
+from .chat_photo import ChatPhoto
 from .chosen_inline_result import ChosenInlineResult
 from .contact import Contact
 from .document import Document
@@ -54,6 +55,7 @@ __all__ = [
     'ChatActions',
     'ChatMember',
     'ChatMemberStatus',
+    'ChatPhoto',
     'ChatType',
     'ChosenInlineResult',
     'Contact',
diff --git a/aiogram/types/base.py b/aiogram/types/base.py
index a0e0ca69..829004b3 100644
--- a/aiogram/types/base.py
+++ b/aiogram/types/base.py
@@ -61,7 +61,7 @@ class Deserializable:
         return result
 
     @property
-    def bot(self):
+    def bot(self) -> 'Bot':
         """
         Bot instance
         """
diff --git a/aiogram/types/chat.py b/aiogram/types/chat.py
index 52040cc1..d2816f29 100644
--- a/aiogram/types/chat.py
+++ b/aiogram/types/chat.py
@@ -1,4 +1,5 @@
 from .base import Deserializable
+from .chat_photo import ChatPhoto
 
 
 class Chat(Deserializable):
@@ -8,7 +9,8 @@ class Chat(Deserializable):
     https://core.telegram.org/bots/api#chat
     """
 
-    def __init__(self, id, type, title, username, first_name, last_name, all_members_are_administrators):
+    def __init__(self, id, type, title, username, first_name, last_name, all_members_are_administrators, photo,
+                 description, invite_link):
         self.id: int = id
         self.type: str = type
         self.title: str = title
@@ -16,6 +18,9 @@ class Chat(Deserializable):
         self.first_name: str = first_name
         self.last_name: str = last_name
         self.all_members_are_administrators: bool = all_members_are_administrators
+        self.photo: ChatPhoto = photo
+        self.description: str = description
+        self.invite_link: str = invite_link
 
     @classmethod
     def de_json(cls, raw_data) -> 'Chat':
@@ -28,8 +33,12 @@ class Chat(Deserializable):
         first_name: str = raw_data.get('first_name')
         last_name: str = raw_data.get('last_name')
         all_members_are_administrators: bool = raw_data.get('all_members_are_administrators', False)
+        photo = raw_data.get('photo')
+        description = raw_data.get('description')
+        invite_link = raw_data.get('invite_link')
 
-        return Chat(id, type, title, username, first_name, last_name, all_members_are_administrators)
+        return Chat(id, type, title, username, first_name, last_name, all_members_are_administrators, photo,
+                    description, invite_link)
 
     @property
     def full_name(self):
@@ -51,6 +60,39 @@ class Chat(Deserializable):
             return self.full_name
         return None
 
+    async def set_photo(self, photo):
+        return await self.bot.set_chat_photo(self.id, photo)
+
+    async def delete_photo(self):
+        return await self.bot.delete_chat_photo(self.id)
+
+    async def set_title(self, title):
+        return await self.bot.set_chat_title(self.id, title)
+
+    async def set_description(self, description):
+        return await self.bot.delete_chat_description(self.id, description)
+
+    async def pin_message(self, message_id: int, disable_notification: bool = False):
+        return await self.bot.pin_chat_message(self.id, message_id, disable_notification)
+
+    async def unpin_message(self):
+        return await self.bot.unpin_chat_message(self.id)
+
+    async def leave(self):
+        return await self.bot.leave_chat(self.id)
+
+    async def get_administrators(self):
+        return await self.bot.get_chat_administrators(self.id)
+
+    async def get_members_count(self):
+        return await self.bot.get_chat_members_count(self.id)
+
+    async def get_member(self, user_id):
+        return await self.bot.get_chat_member(self.id, user_id)
+
+    async def do(self, action):
+        return await self.bot.send_chat_action(self.id, action)
+
 
 class ChatType:
     """
diff --git a/aiogram/types/chat_member.py b/aiogram/types/chat_member.py
index c61dd1fb..189aaa8b 100644
--- a/aiogram/types/chat_member.py
+++ b/aiogram/types/chat_member.py
@@ -1,3 +1,5 @@
+import datetime
+
 from .base import Deserializable
 from .user import User
 
@@ -8,10 +10,34 @@ class ChatMember(Deserializable):
     
     https://core.telegram.org/bots/api#chatmember
     """
-    def __init__(self, user, status):
+
+    def __init__(self, user, status, until_date, can_be_edited, can_change_info, can_post_messages,
+                 can_edit_messages, can_delete_messages, can_invite_users, can_restrict_members,
+                 can_pin_messages, can_promote_members, can_send_messages, can_send_media_messages,
+                 can_send_other_messages, can_add_web_page_previews
+                 ):
         self.user: User = user
         self.status: str = status
 
+        self.until_date: datetime.datetime = until_date
+        self.can_be_edited: bool = can_be_edited
+        self.can_change_info: bool = can_change_info
+        self.can_post_messages: bool = can_post_messages
+        self.can_edit_messages: bool = can_edit_messages
+        self.can_delete_messages: bool = can_delete_messages
+        self.can_invite_users: bool = can_invite_users
+        self.can_restrict_members: bool = can_restrict_members
+        self.can_pin_messages: bool = can_pin_messages
+        self.can_promote_members: bool = can_promote_members
+        self.can_send_messages: bool = can_send_messages
+        self.can_send_media_messages: bool = can_send_media_messages
+        self.can_send_other_messages: bool = can_send_other_messages
+        self.can_add_web_page_previews: bool = can_add_web_page_previews
+
+    @classmethod
+    def _parse_date(cls, unix_time):
+        return datetime.datetime.fromtimestamp(unix_time)
+
     @classmethod
     def de_json(cls, raw_data):
         raw_data = cls.check_json(raw_data)
@@ -19,7 +45,26 @@ class ChatMember(Deserializable):
         user = User.deserialize(raw_data.get('user'))
         status = raw_data.get('status')
 
-        return ChatMember(user, status)
+        until_date = cls._parse_date(raw_data.get('until_date'))
+        can_be_edited = raw_data.get('can_be_edited')
+        can_change_info = raw_data.get('can_change_info')
+        can_post_messages = raw_data.get('can_post_messages')
+        can_edit_messages = raw_data.get('can_edit_messages')
+        can_delete_messages = raw_data.get('can_delete_messages')
+        can_invite_users = raw_data.get('can_invite_users')
+        can_restrict_members = raw_data.get('can_restrict_members')
+        can_pin_messages = raw_data.get('can_pin_messages')
+        can_promote_members = raw_data.get('can_promote_members')
+        can_send_messages = raw_data.get('can_send_messages')
+        can_send_media_messages = raw_data.get('can_send_media_messages')
+        can_send_other_messages = raw_data.get('can_send_other_messages')
+        can_add_web_page_previews = raw_data.get('can_add_web_page_previews')
+
+        return ChatMember(user, status, until_date, can_be_edited, can_change_info, can_post_messages,
+                          can_edit_messages, can_delete_messages, can_invite_users, can_restrict_members,
+                          can_pin_messages, can_promote_members, can_send_messages, can_send_media_messages,
+                          can_send_other_messages, can_add_web_page_previews
+                          )
 
 
 class ChatMemberStatus:
diff --git a/aiogram/types/chat_photo.py b/aiogram/types/chat_photo.py
new file mode 100644
index 00000000..4ea30a15
--- /dev/null
+++ b/aiogram/types/chat_photo.py
@@ -0,0 +1,22 @@
+from .base import Deserializable
+
+
+class ChatPhoto(Deserializable):
+    """
+    This object represents a chat photo.
+    
+    https://core.telegram.org/bots/api#chatphoto
+    """
+
+    def __init__(self, small_file_id, big_file_id):
+        self.small_file_id: str = small_file_id
+        self.big_file_id: str = big_file_id
+
+    @classmethod
+    def de_json(cls, raw_data):
+        raw_data = cls.check_json(raw_data)
+
+        small_file_id = raw_data.get('small_file_id')
+        big_file_id = raw_data.get('big_file_id')
+
+        return ChatPhoto(small_file_id, big_file_id)
diff --git a/aiogram/types/file.py b/aiogram/types/file.py
index da10af51..0f07f7ad 100644
--- a/aiogram/types/file.py
+++ b/aiogram/types/file.py
@@ -26,3 +26,6 @@ class File(Deserializable):
         file_path = raw_data.get('file_path')
 
         return File(file_id, file_size, file_path)
+
+    async def download(self, destination=None, timeout=30, chunk_size=65536, seek=True):
+        return await self.bot.download_file(self.file_path, destination, timeout, chunk_size, seek)
diff --git a/aiogram/types/inline_query_result.py b/aiogram/types/inline_query_result.py
index 5f5139df..efb14748 100644
--- a/aiogram/types/inline_query_result.py
+++ b/aiogram/types/inline_query_result.py
@@ -15,7 +15,7 @@ class InputMessageContent(Serializable):
     """
     def to_json(self):
         return {k: v.to_json() if hasattr(v, 'to_json') else v for k, v in self.__dict__.items() if
-                not k.startswith('_')}
+                v is not None and not k.startswith('_')}
 
 
 class InlineQueryResult(InputMessageContent):
@@ -74,10 +74,10 @@ class InlineQueryResultArticle(InlineQueryResult):
     
     https://core.telegram.org/bots/api#inlinequeryresultarticle
     """
-    def __init__(self, type: str, id: str, title: str, input_message_content: InputMessageContent,
+    def __init__(self, id: str, title: str, input_message_content: InputMessageContent,
                  reply_markup: InlineKeyboardMarkup = None, url: str = None, hide_url: bool = None,
                  description: str = None, thumb_url: str = None, thumb_width: int = None, thumb_height: int = None):
-        self.type: str = type
+        self.type = 'article'
         self.id: str = id
         self.title: str = title
         self.input_message_content: InputMessageContent = input_message_content
@@ -99,10 +99,10 @@ class InlineQueryResultPhoto(InlineQueryResult):
     
     https://core.telegram.org/bots/api#inlinequeryresultphoto
     """
-    def __init__(self, type: str, id: str, photo_url: str, thumb_url: str, photo_width: int = None,
+    def __init__(self, id: str, photo_url: str, thumb_url: str, photo_width: int = None,
                  photo_height: int = None, title: str = None, description: str = None, caption: str = None,
                  reply_markup: InlineKeyboardMarkup = None, input_message_content: InputMessageContent = None):
-        self.type: str = type
+        self.type = 'photo'
         self.id: str = id
         self.photo_url: str = photo_url
         self.thumb_url: str = thumb_url
@@ -126,10 +126,10 @@ class InlineQueryResultGif(InlineQueryResult):
     
     https://core.telegram.org/bots/api#inlinequeryresultgif
     """
-    def __init__(self, type: str, id: str, gif_url: str, thumb_url: str, gif_width: int = None, gif_height: int = None,
+    def __init__(self, id: str, gif_url: str, thumb_url: str, gif_width: int = None, gif_height: int = None,
                  gif_duration: int = None, title: str = None, caption: str = None,
                  reply_markup: InlineKeyboardMarkup = None, input_message_content: InputMessageContent = None):
-        self.type: str = type
+        self.type = 'gif'
         self.id: str = id
         self.gif_url: str = gif_url
         self.gif_width: int = gif_width
@@ -153,10 +153,10 @@ class InlineQueryResultMpeg4Gif(InlineQueryResult):
     
     https://core.telegram.org/bots/api#inlinequeryresultmpeg4gif
     """
-    def __init__(self, type: str, id: str, mpeg4_url: str, thumb_url: str, mpeg4_width: int = None,
+    def __init__(self, id: str, mpeg4_url: str, thumb_url: str, mpeg4_width: int = None,
                  mpeg4_height: int = None, mpeg4_duration: int = None, title: str = None, caption: str = None,
                  reply_markup: InlineKeyboardMarkup = None, input_message_content: InputMessageContent = None):
-        self.type: str = type
+        self.type = 'mpeg4_gif'
         self.id: str = id
         self.mpeg4_url: str = mpeg4_url
         self.mpeg4_width: int = mpeg4_width
@@ -178,11 +178,11 @@ class InlineQueryResultVideo(InlineQueryResult):
     
     https://core.telegram.org/bots/api#inlinequeryresultvideo
     """
-    def __init__(self, type: str, id: str, video_url: str, mime_type: str, thumb_url: str, title: str,
+    def __init__(self, id: str, video_url: str, mime_type: str, thumb_url: str, title: str,
                  caption: str = None, video_width: int = None, video_height: int = None, video_duration: int = None,
                  description: str = None, reply_markup: InlineKeyboardMarkup = None,
                  input_message_content: InputMessageContent = None):
-        self.type: str = type
+        self.type = 'video'
         self.id: str = id
         self.video_url: str = video_url
         self.mime_type: str = mime_type
@@ -204,10 +204,10 @@ class InlineQueryResultAudio(InlineQueryResult):
     
     https://core.telegram.org/bots/api#inlinequeryresultaudio
     """
-    def __init__(self, type: str, id: str, audio_url: str, title: str, caption: str = None, performer: str = None,
+    def __init__(self, id: str, audio_url: str, title: str, caption: str = None, performer: str = None,
                  audio_duration: int = None, reply_markup: InlineKeyboardMarkup = None,
                  input_message_content: InputMessageContent = None):
-        self.type: str = type
+        self.type = 'audio'
         self.id: str = id
         self.audio_url: str = audio_url
         self.title: str = title
@@ -229,9 +229,9 @@ class InlineQueryResultVoice(InlineQueryResult):
     
     https://core.telegram.org/bots/api#inlinequeryresultvoice
     """
-    def __init__(self, type: str, id: str, voice_url: str, title: str, caption: str = None, voice_duration: int = None,
+    def __init__(self, id: str, voice_url: str, title: str, caption: str = None, voice_duration: int = None,
                  reply_markup: InlineKeyboardMarkup = None, input_message_content: InputMessageContent = None):
-        self.type: str = type
+        self.type = 'voice'
         self.id: str = id
         self.voice_url: str = voice_url
         self.title: str = title
@@ -250,11 +250,11 @@ class InlineQueryResultDocument(InlineQueryResult):
     
     https://core.telegram.org/bots/api#inlinequeryresultdocument
     """
-    def __init__(self, type: str, id: str, title: str, document_url: str, mime_type: str, caption: str = None,
+    def __init__(self, id: str, title: str, document_url: str, mime_type: str, caption: str = None,
                  description: str = None, reply_markup: InlineKeyboardMarkup = None,
                  input_message_content: InputMessageContent = None, thumb_url: str = None, thumb_width: int = None,
                  thumb_height: int = None):
-        self.type: str = type
+        self.type = 'document'
         self.id: str = id
         self.title: str = title
         self.caption: str = caption
@@ -276,10 +276,10 @@ class InlineQueryResultLocation(InlineQueryResult):
     
     https://core.telegram.org/bots/api#inlinequeryresultlocation
     """
-    def __init__(self, type: str, id: str, latitude: float, longitude: float, title: str,
+    def __init__(self, id: str, latitude: float, longitude: float, title: str,
                  reply_markup: InlineKeyboardMarkup = None, input_message_content: InputMessageContent = None,
                  thumb_url: str = None, thumb_width: int = None, thumb_height: int = None):
-        self.type: str = type
+        self.type = 'location'
         self.id: str = id
         self.latitude: float = latitude
         self.longitude: float = longitude
@@ -299,11 +299,11 @@ class InlineQueryResultVenue(InlineQueryResult):
     
     https://core.telegram.org/bots/api#inlinequeryresultvenue
     """
-    def __init__(self, type: str, id: str, latitude: float, longitude: float, title: str, address: str,
+    def __init__(self, id: str, latitude: float, longitude: float, title: str, address: str,
                  foursquare_id: str = None, reply_markup: InlineKeyboardMarkup = None,
                  input_message_content: InputMessageContent = None, thumb_url: str = None, thumb_width: int = None,
                  thumb_height: int = None):
-        self.type: str = type
+        self.type = 'venue'
         self.id: str = id
         self.latitude: float = latitude
         self.longitude: float = longitude
@@ -328,10 +328,10 @@ class InlineQueryResultContact(InlineQueryResult):
     
     https://core.telegram.org/bots/api#inlinequeryresultcontact
     """
-    def __init__(self, type: str, id: str, phone_number: str, first_name: str, last_name: str = None,
+    def __init__(self, id: str, phone_number: str, first_name: str, last_name: str = None,
                  reply_markup: InlineKeyboardMarkup = None, input_message_content: InputMessageContent = None,
                  thumb_url: str = None, thumb_width: int = None, thumb_height: int = None):
-        self.type: str = type
+        self.type = 'contact'
         self.id: str = id
         self.phone_number: str = phone_number
         self.first_name: str = first_name
@@ -349,8 +349,8 @@ class InlineQueryResultGame(InlineQueryResult):
     
     https://core.telegram.org/bots/api#inlinequeryresultgame
     """
-    def __init__(self, type: str, id: str, game_short_name: str, reply_markup: InlineKeyboardMarkup = None):
-        self.type: str = type
+    def __init__(self, id: str, game_short_name: str, reply_markup: InlineKeyboardMarkup = None):
+        self.type = 'game'
         self.id: str = id
         self.game_short_name: str = game_short_name
         self.reply_markup: InlineKeyboardMarkup = reply_markup
@@ -367,10 +367,10 @@ class InlineQueryResultCachedPhoto(InlineQueryResult):
     
     https://core.telegram.org/bots/api#inlinequeryresultcachedphoto
     """
-    def __init__(self, type: str, id: str, photo_file_id: str, title: str = None, description: str = None,
+    def __init__(self, id: str, photo_file_id: str, title: str = None, description: str = None,
                  caption: str = None, reply_markup: InlineKeyboardMarkup = None,
                  input_message_content: InputMessageContent = None):
-        self.type: str = type
+        self.type = 'photo'
         self.id: str = id
         self.photo_file_id: str = photo_file_id
         self.title: str = title
@@ -391,9 +391,9 @@ class InlineQueryResultCachedGif(InlineQueryResult):
     
     https://core.telegram.org/bots/api#inlinequeryresultcachedgif
     """
-    def __init__(self, type: str, id: str, gif_file_id: str, title: str = None, caption: str = None,
+    def __init__(self, id: str, gif_file_id: str, title: str = None, caption: str = None,
                  reply_markup: InlineKeyboardMarkup = None, input_message_content: InputMessageContent = None):
-        self.type: str = type
+        self.type = 'gif'
         self.id: str = id
         self.gif_file_id: str = gif_file_id
         self.title: str = title
@@ -413,9 +413,9 @@ class InlineQueryResultCachedMpeg4Gif(InlineQueryResult):
     
     https://core.telegram.org/bots/api#inlinequeryresultcachedmpeg4gif
     """
-    def __init__(self, type: str, id: str, mpeg4_file_id: str, title: str = None, caption: str = None,
+    def __init__(self, id: str, mpeg4_file_id: str, title: str = None, caption: str = None,
                  reply_markup: InlineKeyboardMarkup = None, input_message_content: InputMessageContent = None):
-        self.type: str = type
+        self.type = 'mpeg4_gif'
         self.id: str = id
         self.mpeg4_file_id: str = mpeg4_file_id
         self.title: str = title
@@ -435,9 +435,9 @@ class InlineQueryResultCachedSticker(InlineQueryResult):
     
     https://core.telegram.org/bots/api#inlinequeryresultcachedsticker
     """
-    def __init__(self, type: str, id: str, sticker_file_id: str, reply_markup: InlineKeyboardMarkup = None,
+    def __init__(self, id: str, sticker_file_id: str, reply_markup: InlineKeyboardMarkup = None,
                  input_message_content: InputMessageContent = None):
-        self.type: str = type
+        self.type = 'sticker'
         self.id: str = id
         self.sticker_file_id: str = sticker_file_id
         self.reply_markup: InlineKeyboardMarkup = reply_markup
@@ -455,10 +455,10 @@ class InlineQueryResultCachedDocument(InlineQueryResult):
     
     https://core.telegram.org/bots/api#inlinequeryresultcacheddocument
     """
-    def __init__(self, type: str, id: str, title: str, document_file_id: str, description: str = None,
+    def __init__(self, id: str, title: str, document_file_id: str, description: str = None,
                  caption: str = None, reply_markup: InlineKeyboardMarkup = None,
                  input_message_content: InputMessageContent = None):
-        self.type: str = type
+        self.type = 'document'
         self.id: str = id
         self.title: str = title
         self.document_file_id: str = document_file_id
@@ -477,9 +477,9 @@ class InlineQueryResultCachedVideo(InlineQueryResult):
     
     https://core.telegram.org/bots/api#inlinequeryresultcachedvideo
     """
-    def __init__(self, type: str, id: str, video_file_id: str, title: str, description: str = None, caption: str = None,
+    def __init__(self, id: str, video_file_id: str, title: str, description: str = None, caption: str = None,
                  reply_markup: InlineKeyboardMarkup = None, input_message_content: InputMessageContent = None):
-        self.type: str = type
+        self.type = 'video'
         self.id: str = id
         self.video_file_id: str = video_file_id
         self.title: str = title
@@ -500,9 +500,9 @@ class InlineQueryResultCachedVoice(InlineQueryResult):
     
     https://core.telegram.org/bots/api#inlinequeryresultcachedvoice
     """
-    def __init__(self, type: str, id: str, voice_file_id: str, title: str, caption: str = None,
+    def __init__(self, id: str, voice_file_id: str, title: str, caption: str = None,
                  reply_markup: InlineKeyboardMarkup = None, input_message_content: InputMessageContent = None):
-        self.type: str = type
+        self.type = 'voice'
         self.id: str = id
         self.voice_file_id: str = voice_file_id
         self.title: str = title
@@ -521,9 +521,9 @@ class InlineQueryResultCachedAudio(InlineQueryResult):
     
     https://core.telegram.org/bots/api#inlinequeryresultcachedaudio
     """
-    def __init__(self, type: str, id: str, audio_file_id: str, caption: str = None,
+    def __init__(self, id: str, audio_file_id: str, caption: str = None,
                  reply_markup: InlineKeyboardMarkup = None, input_message_content: InputMessageContent = None):
-        self.type: str = type
+        self.type = 'audio'
         self.id: str = id
         self.audio_file_id: str = audio_file_id
         self.caption: str = caption
diff --git a/aiogram/types/message.py b/aiogram/types/message.py
index 3cd85eee..dd8828c4 100644
--- a/aiogram/types/message.py
+++ b/aiogram/types/message.py
@@ -216,6 +216,9 @@ class Message(Deserializable):
             return False
         return True
 
+    async def pin(self, disable_notification: bool = False):
+        return await self.chat.pin_message(self.message_id, disable_notification)
+
 
 class ContentType:
     """
diff --git a/aiogram/types/user.py b/aiogram/types/user.py
index 247bae09..ed42fa8d 100644
--- a/aiogram/types/user.py
+++ b/aiogram/types/user.py
@@ -69,3 +69,6 @@ class User(Deserializable):
         if not hasattr(self, '_locale'):
             setattr(self, '_locale', babel.core.Locale.parse(self.language_code, sep='-'))
         return getattr(self, '_locale')
+
+    async def get_user_profile_photos(self, offset=None, limit=None):
+        return await self.bot.get_user_profile_photos(self.id, offset, limit)
diff --git a/aiogram/utils/json.py b/aiogram/utils/json.py
new file mode 100644
index 00000000..bc127402
--- /dev/null
+++ b/aiogram/utils/json.py
@@ -0,0 +1,12 @@
+try:
+    import ujson as json
+except ImportError:
+    import json
+
+
+def dumps(data):
+    return json.dumps(data)
+
+
+def loads(data):
+    return json.loads(data)
diff --git a/examples/inline_bot.py b/examples/inline_bot.py
new file mode 100644
index 00000000..e4cd7125
--- /dev/null
+++ b/examples/inline_bot.py
@@ -0,0 +1,26 @@
+import asyncio
+import logging
+
+from aiogram import Bot, types
+from aiogram.dispatcher import Dispatcher
+
+API_TOKEN = 'BOT TOKEN HERE'
+
+logging.basicConfig(level=logging.DEBUG)
+
+loop = asyncio.get_event_loop()
+bot = Bot(token=API_TOKEN, loop=loop)
+dp = Dispatcher(bot)
+
+
+@dp.inline_handler()
+async def inline_echo(inline_query: types.InlineQuery):
+    item = types.InlineQueryResultArticle('1', 'echo', types.InputTextMessageContent(inline_query.query))
+    await bot.answer_inline_query(inline_query.id, results=[item], cache_time=1)
+
+
+if __name__ == '__main__':
+    try:
+        loop.run_until_complete(dp.start_pooling())
+    except KeyboardInterrupt:
+        loop.stop()
diff --git a/requirements.txt b/requirements.txt
index 66620d60..ba3d4c48 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,4 @@
+ujson
 aiohttp>=2.1.0
 appdirs>=1.4.3
 async-timeout>=1.2.1