diff --git a/telebot/async_telebot.py b/telebot/async_telebot.py
index 1a86024..4bcab65 100644
--- a/telebot/async_telebot.py
+++ b/telebot/async_telebot.py
@@ -4483,6 +4483,8 @@ class AsyncTeleBot:
         """
         Use this method to change the list of the bot's commands.
 
+        Note: Commands have to be in all lowercase. Otherwise, Telegram API throws an error.
+
         Telegram documentation: https://core.telegram.org/bots/api#setmycommands
 
         :param commands: List of BotCommand. At most 100 commands can be specified.