diff --git a/pyrogram/methods/chats/pin_chat_message.py b/pyrogram/methods/chats/pin_chat_message.py
index 1eaf6bcd..db4d1086 100644
--- a/pyrogram/methods/chats/pin_chat_message.py
+++ b/pyrogram/methods/chats/pin_chat_message.py
@@ -22,14 +22,18 @@ from typing import Union
 import pyrogram
 from pyrogram import raw, types
 
+from ..messages.inline_session import get_session
+
 
 class PinChatMessage:
+
     async def pin_chat_message(
         self: "pyrogram.Client",
         chat_id: Union[int, str],
         message_id: int,
         disable_notification: bool = False,
         both_sides: bool = False,
+        business_connection_id: str = None,
     ) -> "types.Message":
         """Pin a message in a group, channel or your own chat.
         You must be an administrator in the chat for this to work and must have the "can_pin_messages" admin right in
@@ -52,6 +56,9 @@ class PinChatMessage:
             both_sides (``bool``, *optional*):
                 Pass True to pin the message for both sides (you and recipient).
                 Applicable to private chats only. Defaults to False.
+                
+            business_connection_id (``str``, *optional*):
+                Unique identifier of the business connection on behalf of which the message will be pinned.
 
         Returns:
             :obj:`~pyrogram.types.Message`: On success, the service message is returned.
@@ -65,19 +72,39 @@ class PinChatMessage:
                 # Pin without notification
                 await app.pin_chat_message(chat_id, message_id, disable_notification=True)
         """
-        r = await self.invoke(
-            raw.functions.messages.UpdatePinnedMessage(
-                peer=await self.resolve_peer(chat_id),
-                id=message_id,
-                silent=disable_notification or None,
-                pm_oneside=not both_sides or None
-            )
+        rpc = raw.functions.messages.UpdatePinnedMessage(
+            peer=await self.resolve_peer(chat_id),
+            id=message_id,
+            silent=disable_notification or None,
+            pm_oneside=not both_sides or None
         )
 
+        session = None
+        business_connection = None
+        if business_connection_id:
+            business_connection = self.business_user_connection_cache[business_connection_id]
+            if not business_connection:
+                business_connection = await self.get_business_connection(business_connection_id)
+            session = await get_session(
+                self,
+                business_connection._raw.connection.dc_id
+            )
+
+        if business_connection_id:
+            r = await session.invoke(
+                raw.functions.InvokeWithBusinessConnection(
+                    query=rpc,
+                    connection_id=business_connection_id
+                )
+            )
+        else:
+            r = await self.invoke(rpc)
+
         users = {u.id: u for u in r.users}
         chats = {c.id: c for c in r.chats}
 
         for i in r.updates:
             if isinstance(i, (raw.types.UpdateNewMessage,
-                              raw.types.UpdateNewChannelMessage)):
-                return await types.Message._parse(self, i.message, users, chats)
+                              raw.types.UpdateNewChannelMessage,
+                              raw.types.UpdateBotNewBusinessMessage)):
+                return await types.Message._parse(self, i.message, users, chats, business_connection_id=business_connection_id)
diff --git a/pyrogram/methods/chats/unpin_chat_message.py b/pyrogram/methods/chats/unpin_chat_message.py
index abd01b03..7959962f 100644
--- a/pyrogram/methods/chats/unpin_chat_message.py
+++ b/pyrogram/methods/chats/unpin_chat_message.py
@@ -22,12 +22,15 @@ from typing import Union
 import pyrogram
 from pyrogram import raw
 
+from ..messages.inline_session import get_session
+
 
 class UnpinChatMessage:
     async def unpin_chat_message(
         self: "pyrogram.Client",
         chat_id: Union[int, str],
-        message_id: int = 0
+        message_id: int = 0,
+        business_connection_id: str = None,
     ) -> bool:
         """Unpin a message in a group, channel or your own chat.
         You must be an administrator in the chat for this to work and must have the "can_pin_messages" admin
@@ -38,12 +41,15 @@ class UnpinChatMessage:
         Parameters:
             chat_id (``int`` | ``str``):
                 Unique identifier (int) or username (str) of the target chat.
-                You can also use chat public link in form of *t.me/<username>* (str).
 
             message_id (``int``, *optional*):
                 Identifier of a message to unpin.
+                Required if ``business_connection_id`` is specified.
                 If not specified, the most recent pinned message (by sending date) will be unpinned.
 
+            business_connection_id (``str``, *optional*):
+                Unique identifier of the business connection on behalf of which the message will be unpinned.
+
         Returns:
             ``bool``: True on success.
 
@@ -52,12 +58,32 @@ class UnpinChatMessage:
 
                 await app.unpin_chat_message(chat_id, message_id)
         """
-        await self.invoke(
-            raw.functions.messages.UpdatePinnedMessage(
-                peer=await self.resolve_peer(chat_id),
-                id=message_id,
-                unpin=True
-            )
+        rpc = raw.functions.messages.UpdatePinnedMessage(
+            peer=await self.resolve_peer(chat_id),
+            id=message_id,
+            unpin=True
         )
+        
+        session = None
+        business_connection = None
+        if business_connection_id:
+            business_connection = self.business_user_connection_cache[business_connection_id]
+            if not business_connection:
+                business_connection = await self.get_business_connection(business_connection_id)
+            session = await get_session(
+                self,
+                business_connection._raw.connection.dc_id
+            )
+
+        if business_connection_id:
+            await session.invoke(
+                raw.functions.InvokeWithBusinessConnection(
+                    query=rpc,
+                    connection_id=business_connection_id
+                )
+            )
+        else:
+            await self.invoke(rpc)
 
         return True
+    
\ No newline at end of file