diff --git a/telegram/ext/filters.py b/telegram/ext/filters.py
index eb965e108..67e5d435d 100644
--- a/telegram/ext/filters.py
+++ b/telegram/ext/filters.py
@@ -215,7 +215,7 @@ class Filters(object):
     class _StatusUpdate(BaseFilter):
 
         def filter(self, message):
-            return bool(message.new_chat_member or message.left_chat_member
+            return bool(message.new_chat_members or message.left_chat_member
                         or message.new_chat_title or message.new_chat_photo
                         or message.delete_chat_photo or message.group_chat_created
                         or message.supergroup_chat_created or message.channel_chat_created
diff --git a/telegram/inlinequeryresultgif.py b/telegram/inlinequeryresultgif.py
index e5f8961a7..427986b2a 100644
--- a/telegram/inlinequeryresultgif.py
+++ b/telegram/inlinequeryresultgif.py
@@ -32,6 +32,7 @@ class InlineQueryResultGif(InlineQueryResult):
         thumb_url (str): URL of the static thumbnail for the result (jpeg or gif).
         gif_width (Optional[int]): Width of the GIF.
         gif_height (Optional[int]): Height of the GIF.
+        gif_duration (Optional[int]): Duration of the GIF.
         title (Optional[str]): Title for the result.
         caption	(Optional[str]): Caption of the GIF file to be sent, 0-200 characters.
         reply_markup (Optional[:class:`telegram.InlineKeyboardMarkup`]): Inline keyboard attached
@@ -45,6 +46,7 @@ class InlineQueryResultGif(InlineQueryResult):
         thumb_url (str):
         gif_width (Optional[int]):
         gif_height (Optional[int]):
+        gif_duration (Optional[int]):
         title (Optional[str]):
         caption	(Optional[str]):
         reply_markup (Optional[:class:`telegram.InlineKeyboardMarkup`]):
@@ -63,6 +65,7 @@ class InlineQueryResultGif(InlineQueryResult):
                  caption=None,
                  reply_markup=None,
                  input_message_content=None,
+                 gif_duration=None,
                  **kwargs):
 
         # Required
@@ -75,6 +78,8 @@ class InlineQueryResultGif(InlineQueryResult):
             self.gif_width = gif_width
         if gif_height:
             self.gif_height = gif_height
+        if gif_duration:
+            self.gif_duration = gif_duration
         if title:
             self.title = title
         if caption:
diff --git a/telegram/inlinequeryresultmpeg4gif.py b/telegram/inlinequeryresultmpeg4gif.py
index 3656a7b37..228079d10 100644
--- a/telegram/inlinequeryresultmpeg4gif.py
+++ b/telegram/inlinequeryresultmpeg4gif.py
@@ -32,6 +32,7 @@ class InlineQueryResultMpeg4Gif(InlineQueryResult):
         thumb_url (str): URL of the static thumbnail (jpeg or gif) for the result.
         mpeg4_width (Optional[int]): Video width.
         mpeg4_height (Optional[int]): Video height.
+        mpeg4_duration (Optional[int]): Video duration
         title (Optional[str]): Title for the result.
         caption	(Optional[str]): Caption of the MPEG-4 file to be sent, 0-200 characters.
         reply_markup (Optional[:class:`telegram.InlineKeyboardMarkup`]): Inline keyboard attached
@@ -44,6 +45,7 @@ class InlineQueryResultMpeg4Gif(InlineQueryResult):
         thumb_url (str): URL of the static thumbnail (jpeg or gif) for the result.
         mpeg4_width (Optional[int]): Video width.
         mpeg4_height (Optional[int]): Video height.
+        mpeg4_duration (Optional[int]): Video duration
         title (Optional[str]): Title for the result.
         caption	(Optional[str]): Caption of the MPEG-4 file to be sent, 0-200 characters.
         reply_markup (Optional[:class:`telegram.InlineKeyboardMarkup`]): Inline keyboard attached
@@ -64,6 +66,7 @@ class InlineQueryResultMpeg4Gif(InlineQueryResult):
                  caption=None,
                  reply_markup=None,
                  input_message_content=None,
+                 mpeg4_duration=None,
                  **kwargs):
 
         # Required
@@ -76,6 +79,8 @@ class InlineQueryResultMpeg4Gif(InlineQueryResult):
             self.mpeg4_width = mpeg4_width
         if mpeg4_height:
             self.mpeg4_height = mpeg4_height
+        if mpeg4_duration:
+            self.mpeg4_duration = mpeg4_duration
         if title:
             self.title = title
         if caption:
diff --git a/telegram/message.py b/telegram/message.py
index a2dde4bcb..f63fbf644 100644
--- a/telegram/message.py
+++ b/telegram/message.py
@@ -24,6 +24,7 @@ from time import mktime
 
 from telegram import (Audio, Contact, Document, Chat, Location, PhotoSize, Sticker, TelegramObject,
                       User, Video, Voice, Venue, MessageEntity, Game)
+from telegram.utils.deprecate import warn_deprecate_obj
 from telegram.utils.helpers import escape_html, escape_markdown
 
 
@@ -130,6 +131,7 @@ class Message(TelegramObject):
                  location=None,
                  venue=None,
                  new_chat_member=None,
+                 new_chat_members=None,
                  left_chat_member=None,
                  new_chat_title=None,
                  new_chat_photo=None,
@@ -167,7 +169,8 @@ class Message(TelegramObject):
         self.contact = contact
         self.location = location
         self.venue = venue
-        self.new_chat_member = new_chat_member
+        self._new_chat_member = new_chat_member
+        self.new_chat_members = new_chat_members
         self.left_chat_member = left_chat_member
         self.new_chat_title = new_chat_title
         self.new_chat_photo = new_chat_photo
@@ -224,6 +227,7 @@ class Message(TelegramObject):
         data['location'] = Location.de_json(data.get('location'), bot)
         data['venue'] = Venue.de_json(data.get('venue'), bot)
         data['new_chat_member'] = User.de_json(data.get('new_chat_member'), bot)
+        data['new_chat_members'] = User.de_list(data.get('new_chat_members'), bot)
         data['left_chat_member'] = User.de_json(data.get('left_chat_member'), bot)
         data['new_chat_photo'] = PhotoSize.de_list(data.get('new_chat_photo'), bot)
         data['pinned_message'] = Message.de_json(data.get('pinned_message'), bot)
@@ -257,6 +261,9 @@ class Message(TelegramObject):
             data['entities'] = [e.to_dict() for e in self.entities]
         if self.new_chat_photo:
             data['new_chat_photo'] = [p.to_dict() for p in self.new_chat_photo]
+        data['new_chat_member'] = data.pop('_new_chat_member', None)
+        if self.new_chat_members:
+            data['new_chat_members'] = [u.to_dict() for u in self.new_chat_members]
 
         return data
 
@@ -712,3 +719,8 @@ class Message(TelegramObject):
         else:
             markdown_text += escape_markdown(message_text[last_offset * 2:].decode('utf-16-le'))
         return markdown_text
+
+    @property
+    def new_chat_member(self):
+        warn_deprecate_obj('new_chat_member', 'new_chat_members')
+        return self._new_chat_member
diff --git a/telegram/user.py b/telegram/user.py
index df924751a..e269ae3c7 100644
--- a/telegram/user.py
+++ b/telegram/user.py
@@ -99,3 +99,22 @@ class User(TelegramObject):
         Shortcut for ``bot.getUserProfilePhotos(update.message.from_user.id, *args, **kwargs)``
         """
         return self.bot.getUserProfilePhotos(self.id, *args, **kwargs)
+
+    @staticmethod
+    def de_list(data, bot):
+        """
+        Args:
+            data (list):
+            bot (telegram.Bot):
+
+        Returns:
+            List<telegram.User>:
+        """
+        if not data:
+            return []
+
+        users = list()
+        for user in data:
+            users.append(User.de_json(user, bot))
+
+        return users
diff --git a/telegram/utils/deprecate.py b/telegram/utils/deprecate.py
index af06e1b02..5cbec860e 100644
--- a/telegram/utils/deprecate.py
+++ b/telegram/utils/deprecate.py
@@ -21,8 +21,18 @@
 import warnings
 
 
-def warn_deprecate_obj(old, new):
-    warnings.warn('{0} is being deprecated, please use {1} from now on'.format(old, new))
+# We use our own DeprecationWarning since they are muted by default and "UserWarning" makes it
+# seem like it's the user that issued the warning
+# We name it something else so that you don't get confused when you attempt to suppress it
+class TelegramDeprecationWarning(Warning):
+    pass
+
+
+def warn_deprecate_obj(old, new, stacklevel=3):
+    warnings.warn(
+        '{0} is being deprecated, please use {1} from now on.'.format(old, new),
+        category=TelegramDeprecationWarning,
+        stacklevel=stacklevel)
 
 
 def deprecate(func, old, new):
diff --git a/tests/test_filters.py b/tests/test_filters.py
index ecb173791..bb41e514b 100644
--- a/tests/test_filters.py
+++ b/tests/test_filters.py
@@ -121,9 +121,9 @@ class FiltersTest(BaseTest, unittest.TestCase):
     def test_filters_status_update(self):
         self.assertFalse(Filters.status_update(self.message))
 
-        self.message.new_chat_member = 'test'
+        self.message.new_chat_members = ['test']
         self.assertTrue(Filters.status_update(self.message))
-        self.message.new_chat_member = None
+        self.message.new_chat_members = None
 
         self.message.left_chat_member = 'test'
         self.assertTrue(Filters.status_update(self.message))
diff --git a/tests/test_inlinequeryresultgif.py b/tests/test_inlinequeryresultgif.py
index 1d2d6dc48..4c7cf82c1 100644
--- a/tests/test_inlinequeryresultgif.py
+++ b/tests/test_inlinequeryresultgif.py
@@ -37,6 +37,7 @@ class InlineQueryResultGifTest(BaseTest, unittest.TestCase):
         self.gif_url = 'gif url'
         self.gif_width = 10
         self.gif_height = 15
+        self.gif_duration = 1
         self.thumb_url = 'thumb url'
         self.title = 'title'
         self.caption = 'caption'
@@ -50,6 +51,7 @@ class InlineQueryResultGifTest(BaseTest, unittest.TestCase):
             'gif_url': self.gif_url,
             'gif_width': self.gif_width,
             'gif_height': self.gif_height,
+            'gif_duration': self.gif_duration,
             'thumb_url': self.thumb_url,
             'title': self.title,
             'caption': self.caption,
@@ -65,6 +67,7 @@ class InlineQueryResultGifTest(BaseTest, unittest.TestCase):
         self.assertEqual(gif.gif_url, self.gif_url)
         self.assertEqual(gif.gif_width, self.gif_width)
         self.assertEqual(gif.gif_height, self.gif_height)
+        self.assertEqual(gif.gif_duration, self.gif_duration)
         self.assertEqual(gif.thumb_url, self.thumb_url)
         self.assertEqual(gif.title, self.title)
         self.assertEqual(gif.caption, self.caption)
diff --git a/tests/test_inlinequeryresultmpeg4gif.py b/tests/test_inlinequeryresultmpeg4gif.py
index c0d1d20b5..a9420f99f 100644
--- a/tests/test_inlinequeryresultmpeg4gif.py
+++ b/tests/test_inlinequeryresultmpeg4gif.py
@@ -37,6 +37,7 @@ class InlineQueryResultMpeg4GifTest(BaseTest, unittest.TestCase):
         self.mpeg4_url = 'mpeg4 url'
         self.mpeg4_width = 10
         self.mpeg4_height = 15
+        self.mpeg4_duration = 1
         self.thumb_url = 'thumb url'
         self.title = 'title'
         self.caption = 'caption'
@@ -50,6 +51,7 @@ class InlineQueryResultMpeg4GifTest(BaseTest, unittest.TestCase):
             'mpeg4_url': self.mpeg4_url,
             'mpeg4_width': self.mpeg4_width,
             'mpeg4_height': self.mpeg4_height,
+            'mpeg4_duration': self.mpeg4_duration,
             'thumb_url': self.thumb_url,
             'title': self.title,
             'caption': self.caption,
@@ -65,6 +67,7 @@ class InlineQueryResultMpeg4GifTest(BaseTest, unittest.TestCase):
         self.assertEqual(mpeg4.mpeg4_url, self.mpeg4_url)
         self.assertEqual(mpeg4.mpeg4_width, self.mpeg4_width)
         self.assertEqual(mpeg4.mpeg4_height, self.mpeg4_height)
+        self.assertEqual(mpeg4.mpeg4_duration, self.mpeg4_duration)
         self.assertEqual(mpeg4.thumb_url, self.thumb_url)
         self.assertEqual(mpeg4.title, self.title)
         self.assertEqual(mpeg4.caption, self.caption)