diff --git a/pyrogram/methods/chats/get_chat_members.py b/pyrogram/methods/chats/get_chat_members.py
index 07d831a9..c2d35e4c 100644
--- a/pyrogram/methods/chats/get_chat_members.py
+++ b/pyrogram/methods/chats/get_chat_members.py
@@ -101,19 +101,8 @@ class GetChatMembers(Scaffold):
         """
         peer = await self.resolve_peer(chat_id)
 
-        if isinstance(peer, raw.types.InputPeerChat):
-            r = await self.send(
-                raw.functions.messages.GetFullChat(
-                    chat_id=peer.chat_id
-                )
-            )
-
-            members = getattr(r.full_chat.participants, "participants", [])
-            users = {i.id: i for i in r.users}
-
-            return types.List(types.ChatMember._parse(self, member, users, {}) for member in members)
-        elif isinstance(peer, raw.types.InputPeerChannel):
-            filter = filter.lower()
+        if isinstance(peer, (raw.types.InputPeerChannel, raw.types.InputPeerChat)):
+            filter = filter.lower(),
 
             if filter == Filters.ALL:
                 filter = raw.types.ChannelParticipantsSearch(q=query)