update

app.py

@@ -4,7 +4,7 @@ from telegram.error import TelegramError
 from dotenv import load_dotenv
 
 # Change this import
-from datetime import datetime, UTC  # instead of just datetime
+from datetime import datetime, timezone  # instead of just datetime
 import os
 import asyncio
 
@@ -42,7 +42,7 @@ def health_check():
         {
             "status": "healthy", 
             "message": "Telegram backend is running", 
-            "timestamp": datetime.now(UTC).isoformat() + " UTC"
+            "timestamp": datetime.now(timezone.utc).isoformat() + " UTC"
             }
     )
 
@@ -65,7 +65,7 @@ def send_message():
         if '@' not in email or '.' not in email.split('@')[1]:
             return jsonify({"error": "Invalid email format"}), 400
 
-        timestamp = datetime.now(UTC).isoformat().split('.')[0] + " UTC"
+        timestamp = datetime.now(timezone.utc).isoformat().split('.')[0] + " UTC"
         telegram_message = (
             f"*New Message*\n"
             f"_Received on: {timestamp}_\n"