diff --git a/requirements.txt b/requirements.txt
index 4bb0270..f01e0e2 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-pyrogram==1.2.20
+pyrogram==1.3.5
 tgcrypto==1.2.2
 yt-dlp==2021.12.27
 APScheduler==3.8.1
diff --git a/ytdlbot/tasks.py b/ytdlbot/tasks.py
index 1e92886..20d386f 100644
--- a/ytdlbot/tasks.py
+++ b/ytdlbot/tasks.py
@@ -34,7 +34,6 @@ bot_text = BotText()
 app = Celery('tasks', broker=BROKER)
 
 celery_client = create_app(":memory:")
-celery_client.start()
 
 
 @app.task()
@@ -151,6 +150,7 @@ def normal_download(bot_msg, client, url):
 
 
 def run_celery():
+    celery_client.start()
     argv = [
         "-A", "tasks", 'worker', '--loglevel=info',
         "--pool=threads", f"--concurrency={WORKERS * 2}",
diff --git a/ytdlbot/utils.py b/ytdlbot/utils.py
index 45513e0..67a5cf1 100644
--- a/ytdlbot/utils.py
+++ b/ytdlbot/utils.py
@@ -8,6 +8,7 @@
 __author__ = "Benny <benny.think@gmail.com>"
 
 import contextlib
+import inspect as pyinspect
 import logging
 import os
 import pathlib
@@ -36,7 +37,6 @@ def apply_log_formatter():
 def customize_logger(logger: "list"):
     apply_log_formatter()
     for log in logger:
-        # TODO: bug fix: lost response sometime.
         logging.getLogger(log).setLevel(level=logging.INFO)
 
 
@@ -175,14 +175,51 @@ def tail(f, lines=1, _buffer=4098):
     return lines_found[-lines:]
 
 
-def auto_restart():
-    indicators = ["types.UpdatesTooLong"]
-    with open("/var/log/ytdl.log") as f:
-        logs = "".join(tail(f, lines=5))
+class Detector:
+    def __init__(self, logs: "str"):
+        self.logs = logs
 
-    for indicator in indicators:
-        if indicator in logs:
-            logging.critical("Potential crash detected, suiciding now...")
+    @staticmethod
+    def func_name():
+        with contextlib.suppress(Exception):
+            return pyinspect.stack()[1][3]
+        return "N/A"
+
+    def updates_too_long_detector(self):
+        # If you're seeing this, that means you have logged more than 10 device
+        # and this earliest account was kicked out. Restart the program could get you back in.
+        indicators = ["types.UpdatesTooLong"]
+        for indicator in indicators:
+            if indicator in self.logs:
+                logging.warning("Potential crash detected by %s, it's time to commit suicide...", self.func_name())
+                return True
+        logging.debug("No crash detected.")
+
+    def next_salt_detector(self):
+        text = "Next salt in"
+        if self.logs.count(text) >= 4:
+            logging.warning("Potential crash detected by %s, it's time to commit suicide...", self.func_name())
+            return True
+
+    def idle_detector(self):
+        mtime = os.stat("/var/log/ytdl.log").st_mtime
+        cur_ts = time.time()
+        if cur_ts - mtime > 300:
+            logging.warning("Potential crash detected by %s, it's time to commit suicide...", self.func_name())
+            return True
+
+
+def auto_restart():
+    with open("/var/log/ytdl.log") as f:
+        logs = "".join(tail(f, lines=10))
+
+    det = Detector(logs)
+    method_list = [getattr(det, func) for func in dir(det) if func.endswith("_detector")]
+    for method in method_list:
+        if method():
+            logging.critical("Bye bye world!☠️")
             psutil.Process().kill()
 
-        logging.debug("No crash detected.")
+
+if __name__ == '__main__':
+    auto_restart()
diff --git a/ytdlbot/ytdl_bot.py b/ytdlbot/ytdl_bot.py
index cd43902..e9f5688 100644
--- a/ytdlbot/ytdl_bot.py
+++ b/ytdlbot/ytdl_bot.py
@@ -10,10 +10,8 @@ __author__ = "Benny <benny.think@gmail.com>"
 import logging
 import os
 import re
-import tempfile
 import typing
 
-import filetype
 from apscheduler.schedulers.background import BackgroundScheduler
 from pyrogram import Client, filters, types
 from pyrogram.errors.exceptions.bad_request_400 import UserNotParticipant