diff --git a/telebot/apihelper.py b/telebot/apihelper.py
index a12d38d..24c6c83 100644
--- a/telebot/apihelper.py
+++ b/telebot/apihelper.py
@@ -257,13 +257,14 @@ def send_photo(token, chat_id, photo, caption=None, reply_to_message_id=None, re
 
 def send_media_group(token, chat_id, media, disable_notification=None, reply_to_message_id=None):
     method_url = r'sendMediaGroup'
-    media_json = _convert_list_json_serializable(media)
+    media_json, files = _convert_input_media(media)
     payload = {'chat_id': chat_id, 'media': media_json}
     if disable_notification:
         payload['disable_notification'] = disable_notification
     if reply_to_message_id:
         payload['reply_to_message_id'] = reply_to_message_id
-    return _make_request(token, method_url, params=payload)
+    return _make_request(token, method_url, params=payload, method='post' if files else 'get',
+                         files=files if files else None)
 
 
 def send_location(token, chat_id, latitude, longitude, live_period=None, reply_to_message_id=None, reply_markup=None,
@@ -916,6 +917,19 @@ def _convert_markup(markup):
     return markup
 
 
+def _convert_input_media(array):
+    media = []
+    files = {}
+    for input_media in array:
+        if isinstance(input_media, types.JsonSerializable):
+            media_dict = input_media.to_dic()
+            if media_dict['media'].startswith('attach://'):
+                key = media_dict['media'].replace('attach://', '')
+                files[key] = input_media.media
+            media.append(media_dict)
+    return json.dumps(media), files
+
+
 def _no_encode(func):
     def wrapper(key, val):
         if key == 'filename':
diff --git a/telebot/types.py b/telebot/types.py
index 1621b1e..5ea9b89 100644
--- a/telebot/types.py
+++ b/telebot/types.py
@@ -1981,7 +1981,8 @@ class InputMediaPhoto(JsonSerializable):
         return json.dumps(self.to_dic())
 
     def to_dic(self):
-        ret = {'type': self.type, 'media': self.media}
+        ret = {'type': self.type, 'media': 'attach://' + util.generate_random_token()
+               if not util.is_string(self.media) else self.media}
         if self.caption:
             ret['caption'] = self.caption
         return ret
@@ -2000,7 +2001,8 @@ class InputMediaVideo(JsonSerializable):
         return json.dumps(self.to_dic())
 
     def to_dic(self):
-        ret = {'type': self.type, 'media': self.media}
+        ret = {'type': self.type, 'media': 'attach://' + util.generate_random_token()
+               if not util.is_string(self.media) else self.media}
         if self.caption:
             ret['caption'] = self.caption
         if self.width:
diff --git a/telebot/util.py b/telebot/util.py
index ab7650d..ca080cc 100644
--- a/telebot/util.py
+++ b/telebot/util.py
@@ -1,5 +1,6 @@
 # -*- coding: utf-8 -*-
-
+import random
+import string
 import threading
 import traceback
 import re
@@ -254,3 +255,7 @@ def per_thread(key, construct_value):
         value = construct_value()
         setattr(thread_local, key, value)
         return value
+
+
+def generate_random_token():
+    return ''.join(random.sample(string.ascii_letters, 16))
\ No newline at end of file