diff --git a/README.md b/README.md
index a618836..5792f54 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,6 @@
 [![PyPi Package Version](https://img.shields.io/pypi/v/pyTelegramBotAPI.svg)](https://pypi.python.org/pypi/pyTelegramBotAPI)
 [![Supported Python versions](https://img.shields.io/pypi/pyversions/pyTelegramBotAPI.svg)](https://pypi.python.org/pypi/pyTelegramBotAPI)
 [![Documentation Status](https://readthedocs.org/projects/pytba/badge/?version=latest)](https://pytba.readthedocs.io/en/latest/?badge=latest)
-[![Build Status](https://travis-ci.org/eternnoir/pyTelegramBotAPI.svg?branch=master)](https://travis-ci.org/eternnoir/pyTelegramBotAPI)
 [![PyPi downloads](https://img.shields.io/pypi/dm/pyTelegramBotAPI.svg)](https://pypi.org/project/pyTelegramBotAPI/)
 [![PyPi status](https://img.shields.io/pypi/status/pytelegrambotapi.svg?style=flat-square)](https://pypi.python.org/pypi/pytelegrambotapi)
 
diff --git a/telebot/__init__.py b/telebot/__init__.py
index 0d36d7b..43a462c 100644
--- a/telebot/__init__.py
+++ b/telebot/__init__.py
@@ -451,7 +451,7 @@ class TeleBot:
                     drop_pending_updates: Optional[bool] = None,
                     timeout: Optional[int]=None,
                     secret_token: Optional[str]=None,
-                    secret_token_length: Optional[int]=20,):
+                    secret_token_length: Optional[int]=20):
         """
         This class sets webhooks and listens to a given url and port.
 
@@ -1906,6 +1906,8 @@ class TeleBot:
         :param message_thread_id: Identifier of a message thread, in which the message will be sent
         :type message_thread_id: :obj:`int`
 
+        :param thumb: Deprecated. Use thumbnail instead
+
         :return: On success, the sent Message is returned.
         :rtype: :class:`telebot.types.Message`
         """
@@ -2072,6 +2074,8 @@ class TeleBot:
         :param message_thread_id: The thread to which the message will be sent
         :type message_thread_id: :obj:`int`
 
+        :param thumb: Deprecated. Use thumbnail instead
+
         :return: On success, the sent Message is returned.
         :rtype: :class:`telebot.types.Message`
         """
@@ -2256,6 +2260,8 @@ class TeleBot:
         :param has_spoiler: Pass True, if the video should be sent as a spoiler
         :type has_spoiler: :obj:`bool`
 
+        :param thumb: Deprecated. Use thumbnail instead
+
         :return: On success, the sent Message is returned.
         :rtype: :class:`telebot.types.Message`
         """
@@ -2359,6 +2365,8 @@ class TeleBot:
         :param has_spoiler: Pass True, if the animation should be sent as a spoiler
         :type has_spoiler: :obj:`bool`
 
+        :param thumb: Deprecated. Use thumbnail instead
+
         :return: On success, the sent Message is returned.
         :rtype: :class:`telebot.types.Message`
         """
@@ -2438,6 +2446,8 @@ class TeleBot:
         :param message_thread_id: Identifier of a message thread, in which the video note will be sent
         :type message_thread_id: :obj:`int`
 
+        :param thumb: Deprecated. Use thumbnail instead
+
         :return: On success, the sent Message is returned.
         :rtype: :class:`telebot.types.Message`
         """
@@ -6740,7 +6750,6 @@ class TeleBot:
                     if not process_handler: continue
                     for i in inspect.signature(handler['function']).parameters:
                         params.append(i)
-                    result = None
                     if len(params) == 1:
                         result = handler['function'](message)
                     elif "data" in params:
diff --git a/telebot/apihelper.py b/telebot/apihelper.py
index 6d59b84..88b36f9 100644
--- a/telebot/apihelper.py
+++ b/telebot/apihelper.py
@@ -1479,7 +1479,8 @@ def send_invoice(
     :param max_tip_amount: The maximum accepted amount for tips in the smallest units of the currency
     :param suggested_tip_amounts: A JSON-serialized array of suggested amounts of tips in the smallest units of the currency.
         At most 4 suggested tip amounts can be specified. The suggested tip amounts must be positive, passed in a strictly increased order and must not exceed max_tip_amount.
-    :param protect_content:
+    :param protect_content: Protects the contents of the sent message from forwarding and saving
+    :param message_thread_id: Unique identifier for the target message thread (topic) of the forum; for forum supergroups only
     :return:
     """
     method_url = r'sendInvoice'
diff --git a/telebot/async_telebot.py b/telebot/async_telebot.py
index f13d1a0..2e0af51 100644
--- a/telebot/async_telebot.py
+++ b/telebot/async_telebot.py
@@ -209,8 +209,8 @@ class AsyncTeleBot:
         :param allowed_updates: Array of string. List the types of updates you want your bot to receive.
         :type allowed_updates: :obj:`list`, optional
 
-        :param long_polling_timeout: Timeout in seconds for long polling.
-        :type long_polling_timeout: :obj:`int`, optional
+        :param request_timeout: Timeout in seconds for request.
+        :type request_timeout: :obj:`int`, optional
 
         :return: An Array of Update objects is returned.
         :rtype: :obj:`list` of :class:`telebot.types.Update`
@@ -511,7 +511,6 @@ class AsyncTeleBot:
                     if not process_update: continue
                     for i in signature(handler['function']).parameters:
                         params.append(i)
-                    result = None
                     if len(params) == 1:
                         result = await handler['function'](message)
                     elif "data" in params:
@@ -2072,6 +2071,8 @@ class AsyncTeleBot:
         :param drop_pending_updates: Pass True to drop all pending updates
         :param timeout: Integer. Request connection timeout
         :param secret_token: Secret token to be used to verify the webhook request.
+        :param secret_token_length: Length of a secret token, defaults to 20
+        :param debug: Debug mode, defaults to False
         :return:
         """
 
@@ -2079,12 +2080,9 @@ class AsyncTeleBot:
         if not secret_token:
             secret_token = ''.join(random.choices(string.ascii_uppercase + string.digits, k=secret_token_length))
 
-
         if not url_path:
             url_path = self.token + '/'
         if url_path[-1] != '/': url_path += '/'
-        
-
 
         protocol = "https" if certificate else "http"
         if not webhook_url:
@@ -2093,8 +2091,6 @@ class AsyncTeleBot:
         if certificate and certificate_key:
             ssl_ctx = ssl.create_default_context(ssl.Purpose.CLIENT_AUTH)
             ssl_ctx.load_cert_chain(certificate, certificate_key)
-        else:
-            ssl_ctx = None
 
         # open certificate if it exists
         cert_file = open(certificate, 'rb') if certificate else None
@@ -2769,6 +2765,8 @@ class AsyncTeleBot:
         :param message_thread_id: Identifier of a message thread, in which the message will be sent
         :type message_thread_id: :obj:`int`
 
+        :param thumb: Deprecated. Use thumbnail instead
+
         :return: On success, the sent Message is returned.
         :rtype: :class:`telebot.types.Message`
         """
@@ -2934,6 +2932,8 @@ class AsyncTeleBot:
         :param message_thread_id: Identifier of a message thread, in which the message will be sent
         :type message_thread_id: :obj:`int`
 
+        :param thumb: Deprecated. Use thumbnail instead
+
         :return: On success, the sent Message is returned.
         :rtype: :class:`telebot.types.Message`
         """
@@ -3116,6 +3116,8 @@ class AsyncTeleBot:
         :param has_spoiler: Pass True, if the video should be sent as a spoiler
         :type has_spoiler: :obj:`bool`
 
+        :param thumb: Deprecated. Use thumbnail instead
+
         :return: On success, the sent Message is returned.
         :rtype: :class:`telebot.types.Message`
         """
@@ -3220,6 +3222,8 @@ class AsyncTeleBot:
         :param has_spoiler: Pass True, if the animation should be sent as a spoiler
         :type has_spoiler: :obj:`bool`
 
+        :param thumb: Deprecated. Use thumbnail instead
+
         :return: On success, the sent Message is returned.
         :rtype: :class:`telebot.types.Message`
         """
@@ -3299,6 +3303,8 @@ class AsyncTeleBot:
         :param message_thread_id: Identifier of a message thread, in which the video note will be sent
         :type message_thread_id: :obj:`int`
 
+        :param thumb: Deprecated. Use thumbnail instead
+
         :return: On success, the sent Message is returned.
         :rtype: :class:`telebot.types.Message`
         """
@@ -5609,7 +5615,7 @@ class AsyncTeleBot:
 
     async def create_new_sticker_set(
             self, user_id: int, name: str, title: str, 
-            emojis: Optional[str]=None, 
+            emojis: Optional[List[str]]=None,
             png_sticker: Union[Any, str]=None, 
             tgs_sticker: Union[Any, str]=None, 
             webm_sticker: Union[Any, str]=None,
diff --git a/telebot/asyncio_helper.py b/telebot/asyncio_helper.py
index 0494f27..49dc92d 100644
--- a/telebot/asyncio_helper.py
+++ b/telebot/asyncio_helper.py
@@ -173,6 +173,7 @@ async def get_file_url(token, file_id):
     if FILE_URL is None:
         return "https://api.telegram.org/file/bot{0}/{1}".format(token, (await get_file(token, file_id))['file_path'])
     else:
+        # noinspection PyUnresolvedReferences
         return FILE_URL.format(token, (await get_file(token, file_id))['file_path'])
 
 
@@ -180,6 +181,7 @@ async def download_file(token, file_path):
     if FILE_URL is None:
         url =  "https://api.telegram.org/file/bot{0}/{1}".format(token, file_path)
     else:
+        # noinspection PyUnresolvedReferences
         url =  FILE_URL.format(token, file_path)
     session = await session_manager.get_session()
     async with session.get(url, proxy=proxy) as response:
@@ -1433,8 +1435,8 @@ async def send_invoice(
         need_name=None, need_phone_number=None, need_email=None, need_shipping_address=None,
         send_phone_number_to_provider = None, send_email_to_provider = None, is_flexible=None,
         disable_notification=None, reply_to_message_id=None, reply_markup=None, provider_data=None,
-        timeout=None, allow_sending_without_reply=None, max_tip_amount=None, suggested_tip_amounts=None, protect_content=None,
-        message_thread_id=None):
+        timeout=None, allow_sending_without_reply=None, max_tip_amount=None, suggested_tip_amounts=None,
+        protect_content=None, message_thread_id=None):
     """
     Use this method to send invoices. On success, the sent Message is returned.
     :param token: Bot's token (you don't need to fill this)
@@ -1466,7 +1468,8 @@ async def send_invoice(
     :param max_tip_amount: The maximum accepted amount for tips in the smallest units of the currency
     :param suggested_tip_amounts: A JSON-serialized array of suggested amounts of tips in the smallest units of the currency.
         At most 4 suggested tip amounts can be specified. The suggested tip amounts must be positive, passed in a strictly increased order and must not exceed max_tip_amount.
-    :param protect_content:
+    :param protect_content: Protects the contents of the sent message from forwarding and saving
+    :param message_thread_id: Unique identifier for the target message thread (topic) of the forum; for forum supergroups only
     :return:
     """
     method_url = r'sendInvoice'