diff --git a/tgram/tgbot.py b/tgram/tgbot.py
index e09acab..f510d07 100644
--- a/tgram/tgbot.py
+++ b/tgram/tgbot.py
@@ -11,7 +11,7 @@
 from .methods import TelegramBotMethods
 from .decorators import Decorators
 from .errors import APIException
-from .utils import API_URL, get_file_name
+from .utils import API_URL, get_file_name, ALL_UPDATES
 from .sync import wrap
 from concurrent.futures.thread import ThreadPoolExecutor
 
@@ -148,8 +148,10 @@ def __init__(
         self._api_url = f"{api_url}bot{bot_token}/"
 
     def add_handler(self, handler: "tgram.handlers.Handler") -> None:
-        if (t := handler.type != "all") and t not in self.allowed_updates:
-            self.allowed_updates.append(t)
+        if handler.type == "all":
+            self.allowed_updates = ALL_UPDATES
+        elif handler.type not in self.allowed_updates:
+            self.allowed_updates.append(handler.type)
 
         logger.info(
             "(%s) added to %s handlers",
diff --git a/tgram/utils.py b/tgram/utils.py
index 21d3367..b8ed31b 100644
--- a/tgram/utils.py
+++ b/tgram/utils.py
@@ -3,9 +3,10 @@
 import os
 
 from pathlib import Path
+from typing import List
 
 API_URL = "https://api.telegram.org/"
-ALL_UPDATES = [
+ALL_UPDATES: List[str] = [
     getattr(Handlers, i)
     for i in filter(lambda x: not x.startswith("_"), Handlers.__dict__)
 ]