diff --git a/main.py b/main.py
index 5dc02ab..2df1109 100644
--- a/main.py
+++ b/main.py
@@ -17,7 +17,7 @@ from utils.pixiv import ProcessPixiv
 from utils.telegram import Telegram
 
 if TYPE_CHECKING:
-    from telegram import Chat, Message, Update
+    from telegram import Message, Update
     from telegram.ext import Application, ContextTypes
 
 logger = get_logger(__name__)
@@ -141,7 +141,7 @@ async def cmd_set_forward_channel(update: Update, context: ContextTypes.DEFAULT_
         return
     channel = context.args[0]
     try:
-        channel: Chat = await context.bot.get_chat(channel)
+        channel = await context.bot.get_chat(channel)
     except Exception as e:
         await update.effective_message.reply_text(str(e))
         return
@@ -153,6 +153,11 @@ async def cmd_set_forward_channel(update: Update, context: ContextTypes.DEFAULT_
     except Exception as e:
         await update.effective_message.reply_text(str(e) + "\nPlease add the bot to the channel and set as admin")
         return
+    user = filter(lambda x: x.user.id == update.effective_user.id, channel_admin)
+    user = next(user, None)
+    if not user:
+        await update.effective_message.reply_text("You are not an admin of the channel.")
+        return
     user_bot = filter(lambda x: x.user.id == context.bot.id, channel_admin)
     user_bot = next(user_bot, None)
     if user_bot.can_post_messages:
diff --git a/utils/telegram.py b/utils/telegram.py
index d2b4b37..b53b5a2 100644
--- a/utils/telegram.py
+++ b/utils/telegram.py
@@ -18,7 +18,7 @@ class Telegram:
             async with TelegramPixiv(self._url) as pixiv:
                 return pixiv
         else:
-            return None
+            return None  # TODO add raise and catch
 
     async def __aexit__(self, exc_type, exc_val, exc_tb):
         pass