diff --git a/matterdelta/hooks.py b/matterdelta/hooks.py
index a4e4c1a..39b7614 100644
--- a/matterdelta/hooks.py
+++ b/matterdelta/hooks.py
@@ -13,9 +13,8 @@
 )
 
 from .api import dc2mb, init_api
-from .util import get_log_level
 
-cli = BotCli("matterdelta", log_level=get_log_level())
+cli = BotCli("matterdelta")
 
 
 @cli.on_init
@@ -26,6 +25,7 @@ def _on_init(bot: Bot, _args: Namespace) -> None:
             status = "I am a Delta Chat bot, send me /help for more info"
             bot.rpc.set_config(accid, "selfstatus", status)
             bot.rpc.set_config(accid, "delete_server_after", "1")
+            bot.rpc.set_config(accid, "delete_device_after", str(60 * 60 * 24 * 30))
 
 
 @cli.on_start
@@ -36,7 +36,7 @@ def _on_start(bot: Bot, args: Namespace) -> None:
 @cli.on(events.RawEvent)
 def _log_event(bot: Bot, accid: int, event: AttrDict) -> None:
     if event.kind == EventType.INFO:
-        bot.logger.info(event.msg)
+        bot.logger.debug(event.msg)
     elif event.kind == EventType.WARNING:
         bot.logger.warning(event.msg)
     elif event.kind == EventType.ERROR:
@@ -74,6 +74,8 @@ def _id(bot: Bot, accid: int, event: AttrDict) -> None:
 
 def _send_help(bot: Bot, accid: int, chatid: int) -> None:
     text = (
+        "I'm a bot, I allow to bridge Delta Chat groups with groups in other platforms."
+        " Only the bot administrator can bridge groups.\n"
         "**Available commands**\n\n"
         "/id - send me this command in a group to get its ID."
     )
diff --git a/matterdelta/util.py b/matterdelta/util.py
deleted file mode 100644
index 40a9dee..0000000
--- a/matterdelta/util.py
+++ /dev/null
@@ -1,10 +0,0 @@
-"""Utilities"""
-
-import logging
-import os
-
-
-def get_log_level() -> int:
-    """Get log level from environment variables. Defaults to INFO if not set."""
-    level = os.getenv("MATTERDELTA_DEBUG", "info").upper()
-    return int(getattr(logging, level))
diff --git a/pyproject.toml b/pyproject.toml
index f93730d..80bed23 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -18,7 +18,7 @@ classifiers = [
   "License :: OSI Approved :: GNU General Public License v3 or later (GPLv3+)",
 ]
 dependencies = [
-    "deltabot-cli>=3.0.0,<4.0",
+    "deltabot-cli>=4.0.0,<5.0",
     "requests",
 ]