diff --git a/wulkabot/bot.py b/wulkabot/bot.py
index f550e53..3cdb8b4 100644
--- a/wulkabot/bot.py
+++ b/wulkabot/bot.py
@@ -20,6 +20,7 @@ class Wulkabot(commands.Bot):
     async def setup_hook(self) -> None:
         self.http_client = aiohttp.ClientSession()
         await self.load_extensions(cogs)
+        await self.tree.sync()
 
     async def on_connect(self) -> None:
         print(f"Connected as {self.user}")
@@ -42,7 +43,7 @@ class Wulkabot(commands.Bot):
             return name.rsplit(".", maxsplit=1)[-1]
 
         extensions = set()
-        for package in pkgutil.walk_packages(module.__path__, module.__name__ + "."):
+        for package in pkgutil.walk_packages(module.__path__, f"{module.__name__}."):
             if package.ispkg or unqualify(package.name).startswith("_"):
                 continue
             extensions.add(package.name)
diff --git a/wulkabot/cogs/development.py b/wulkabot/cogs/development.py
deleted file mode 100644
index d246b7c..0000000
--- a/wulkabot/cogs/development.py
+++ /dev/null
@@ -1,22 +0,0 @@
-from discord.ext import commands
-
-from .. import bot
-
-
-class Development(commands.Cog):
-    def __init__(self, bot: bot.Wulkabot) -> None:
-        super().__init__()
-        self.bot = bot
-
-    @commands.command()
-    @commands.has_role("Maintainer")
-    async def sync(self, ctx: commands.Context):
-        """Synchronizuje komendy bota"""
-
-        commands = await self.bot.tree.sync()
-        commands_str = ", ".join(c.name for c in commands)
-        await ctx.reply(f"Zsynchronizowano **{len(commands)}** komend\n{commands_str}")
-
-
-async def setup(bot: bot.Wulkabot):
-    await bot.add_cog(Development(bot))