diff --git a/telebot/__init__.py b/telebot/__init__.py
index a6a20ff..f166a27 100644
--- a/telebot/__init__.py
+++ b/telebot/__init__.py
@@ -45,6 +45,7 @@ class ExceptionHandler:
     Class for handling exceptions while Polling
     """
 
+    # noinspection PyMethodMayBeStatic,PyUnusedLocal
     def handle(self, exception):
         return False
 
@@ -235,7 +236,8 @@ class TeleBot:
         """
         self.reply_backend.load_handlers(filename, del_file_after_loading)
 
-    def set_webhook(self, url=None, certificate=None, max_connections=None, allowed_updates=None, ip_address=None, timeout=None):
+    def set_webhook(self, url=None, certificate=None, max_connections=None, allowed_updates=None, ip_address=None,
+                    drop_pending_updates = None, timeout=None):
         """
         Use this method to specify a url and receive incoming updates via an outgoing webhook. Whenever there is an
         update for the bot, we will send an HTTPS POST request to the specified url, containing a JSON-serialized Update.
@@ -246,10 +248,11 @@ class TeleBot:
         :param max_connections: Maximum allowed number of simultaneous HTTPS connections to the webhook for update delivery, 1-100. Defaults to 40. Use lower values to limit the load on your bot's server, and higher values to increase your bot's throughput.
         :param allowed_updates: A JSON-serialized list of the update types you want your bot to receive. For example, specify [“message”, “edited_channel_post”, “callback_query”] to only receive updates of these types. See Update for a complete list of available update types. Specify an empty list to receive all updates regardless of type (default). If not specified, the previous setting will be used.
         :param ip_address: The fixed IP address which will be used to send webhook requests instead of the IP address resolved through DNS
+        :param drop_pending_updates: Pass True to drop all pending updates
         :param timeout: Integer. Request connection timeout
         :return:
         """
-        return apihelper.set_webhook(self.token, url, certificate, max_connections, allowed_updates, ip_address, timeout)
+        return apihelper.set_webhook(self.token, url, certificate, max_connections, allowed_updates, ip_address, drop_pending_updates, timeout)
 
     def delete_webhook(self, drop_pending_updates=None, timeout=None):
         """
diff --git a/telebot/apihelper.py b/telebot/apihelper.py
index f059cb4..1cedbc8 100644
--- a/telebot/apihelper.py
+++ b/telebot/apihelper.py
@@ -206,7 +206,8 @@ def send_message(
     return _make_request(token, method_url, params=payload, method='post')
 
 
-def set_webhook(token, url=None, certificate=None, max_connections=None, allowed_updates=None, ip_address=None, timeout=None):
+def set_webhook(token, url=None, certificate=None, max_connections=None, allowed_updates=None, ip_address=None,
+                drop_pending_updates = None, timeout=None):
     method_url = r'setWebhook'
     payload = {
         'url': url if url else "",
@@ -216,10 +217,12 @@ def set_webhook(token, url=None, certificate=None, max_connections=None, allowed
         files = {'certificate': certificate}
     if max_connections:
         payload['max_connections'] = max_connections
-    if allowed_updates is not None:  # Empty lists should pass
+    if allowed_updates is not None:       # Empty lists should pass
         payload['allowed_updates'] = json.dumps(allowed_updates)
-    if ip_address is not None:       # Empty string should pass
+    if ip_address is not None:            # Empty string should pass
         payload['ip_address'] = ip_address
+    if drop_pending_updates is not None:  # Any bool value should pass
+        payload['drop_pending_updates'] = drop_pending_updates
     if timeout:
         payload['connect-timeout'] = timeout
     return _make_request(token, method_url, params=payload, files=files)
@@ -228,7 +231,7 @@ def set_webhook(token, url=None, certificate=None, max_connections=None, allowed
 def delete_webhook(token, drop_pending_updates=None, timeout=None):
     method_url = r'deleteWebhook'
     payload = {}
-    if drop_pending_updates is not None:  # None / True / False
+    if drop_pending_updates is not None:  # Any bool value should pass
         payload['drop_pending_updates'] = drop_pending_updates
     if timeout:
         payload['connect-timeout'] = timeout
diff --git a/tests/test_telebot.py b/tests/test_telebot.py
index 6ca56fb..547d29d 100644
--- a/tests/test_telebot.py
+++ b/tests/test_telebot.py
@@ -48,6 +48,7 @@ class TestTeleBot:
         bot = telebot.TeleBot('')
         msg = self.create_text_message(r'https://web.telegram.org/')
 
+        # noinspection PyUnusedLocal
         @bot.message_handler(regexp=r'((https?):((//)|(\\\\))+([\w\d:#@%/;$()~_?\+-=\\\.&](#!)?)*)')
         def command_url(message):
             msg.text = 'got'
@@ -60,6 +61,7 @@ class TestTeleBot:
         bot = telebot.TeleBot('')
         msg = self.create_text_message(r'lambda_text')
 
+        # noinspection PyUnusedLocal
         @bot.message_handler(func=lambda message: r'lambda' in message.text)
         def command_url(message):
             msg.text = 'got'
@@ -72,6 +74,7 @@ class TestTeleBot:
         bot = telebot.TeleBot('')
         msg = self.create_text_message(r'text')
 
+        # noinspection PyUnusedLocal
         @bot.message_handler(func=lambda message: r'lambda' in message.text)
         def command_url(message):
             msg.text = 'got'
@@ -84,6 +87,7 @@ class TestTeleBot:
         bot = telebot.TeleBot('')
         msg = self.create_text_message(r'web.telegram.org/')
 
+        # noinspection PyUnusedLocal
         @bot.message_handler(regexp=r'((https?):((//)|(\\\\))+([\w\d:#@%/;$()~_?\+-=\\\.&](#!)?)*)')
         def command_url(message):
             msg.text = 'got'
@@ -522,6 +526,7 @@ class TestTeleBot:
         tb = telebot.TeleBot('')
         update = self.create_message_update('/help')
 
+        # noinspection PyUnusedLocal
         @tb.middleware_handler(update_types=['message'])
         def middleware(tb_instance, message):
             message.text = 'got'
@@ -542,9 +547,10 @@ class TestTeleBot:
         tb = telebot.TeleBot('')
         update = self.create_message_update('/help')
 
+        # noinspection PyUnusedLocal
         @tb.middleware_handler()
-        def middleware(tb_instance, update):
-            update.message.text = 'got'
+        def middleware(tb_instance, mw_update):
+            mw_update.message.text = 'got'
 
         @tb.message_handler(func=lambda m: m.text == 'got')
         def command_handler(message):
@@ -556,6 +562,6 @@ class TestTeleBot:
 
     def test_chat_permissions(self):
         return # CHAT_ID is private chat, no permissions can be set
-        tb = telebot.TeleBot(TOKEN)
-        permissions = types.ChatPermissions(can_send_messages=True, can_send_polls=False)
-        msg = tb.set_chat_permissions(CHAT_ID, permissions)
+        #tb = telebot.TeleBot(TOKEN)
+        #permissions = types.ChatPermissions(can_send_messages=True, can_send_polls=False)
+        #msg = tb.set_chat_permissions(CHAT_ID, permissions)