diff --git a/pyrogram/methods/chats/update_chat_notifications.py b/pyrogram/methods/chats/update_chat_notifications.py
index 08e5640b..ce21458e 100644
--- a/pyrogram/methods/chats/update_chat_notifications.py
+++ b/pyrogram/methods/chats/update_chat_notifications.py
@@ -1,5 +1,4 @@
 from typing import Union
-from datetime import datetime, timedelta
 
 from pyrogram.raw.functions.account import UpdateNotifySettings
 from pyrogram.raw.types import InputNotifyPeer, InputPeerNotifySettings
@@ -12,7 +11,7 @@ class UpdateChatNotifications(Scaffold):
         chat_id: Union[int, str],
         show_previews: bool = None,
         silent: bool = None,
-        mute_until: Union[int, datetime, timedelta] = None
+        mute_until: int = None
     ) -> bool:
         """Update the notification settings for the selected chat
 
@@ -27,7 +26,7 @@ class UpdateChatNotifications(Scaffold):
                 If the chat shall be muted.
 
             mute_until (``int`` | ``datetime.datetime`` | ``datetime.timdelta``, *optional*):
-                Unix timestamp, datetime or timedelta object that sets up when notifications shall be switched off.
+                When notifications shall be switched off. Unix time.
                 Default to forever.
 
         Returns:
@@ -52,13 +51,6 @@ class UpdateChatNotifications(Scaffold):
                 app.update_chat_notifications(chat_id, silent=False)
         """
 
-        if isinstance(mute_until, datetime):
-            mute_until = mute_until.timestamp()
-
-        if isinstance(mute_until, timedelta):
-            now = datetime.now()
-            mute_until = now.timestamp() + mute_until.total_seconds()
-
         peer = await self.resolve_peer(chat_id)
 
         r = await self.send(