diff --git a/extensions/speak.py b/extensions/speak.py
index cfdd7ab..0284bd5 100644
--- a/extensions/speak.py
+++ b/extensions/speak.py
@@ -1,6 +1,6 @@
 from discord.ext import commands
 from discord import Member, VoiceState, Embed, Reaction, Guild
-from discord.ext.commands import CommandNotFound, BadArgument
+from discord.ext.commands import BadArgument
 from discord_slash import SlashContext, cog_ext, SlashCommandOptionType
 from discord_slash.utils import manage_commands
 
diff --git a/extensions/tex.py b/extensions/tex.py
index 36311d1..53a601e 100644
--- a/extensions/tex.py
+++ b/extensions/tex.py
@@ -1,6 +1,5 @@
 from urllib.parse import urlencode
 
-from discord import Embed
 from discord.ext import commands
 from discord_slash import cog_ext, SlashContext, SlashCommandOptionType
 from discord_slash.utils import manage_commands
diff --git a/extensions/warn.py b/extensions/warn.py
index ecf3255..e2c082e 100644
--- a/extensions/warn.py
+++ b/extensions/warn.py
@@ -1,9 +1,11 @@
 from discord import Embed, Forbidden, Member, Guild
 from discord.ext import commands
 from discord.ext.commands import BadArgument
+from discord_slash import cog_ext, SlashCommandOptionType, SlashContext
+from discord_slash.utils import manage_commands
 
-from administrator import db
-from administrator.check import is_enabled
+from administrator import db, slash
+from administrator.check import is_enabled, guild_only, has_permissions
 from administrator.logger import logger
 from administrator.utils import time_pars, seconds_to_time_string
 
@@ -14,12 +16,13 @@ logger = logger.getChild(extension_name)
 class Warn(commands.Cog):
     def __init__(self, bot: commands.Bot):
         self.bot = bot
+        slash.get_cog_commands(self)
 
     def description(self):
         return "Send warning to user and make custom action after a number of warn"
 
     @staticmethod
-    async def check_warn(ctx: commands.Context, target: Member):
+    async def check_warn(ctx: SlashContext, target: Member):
         s = db.Session()
         c = s.query(db.Warn).filter(db.Warn.guild == ctx.guild.id, db.Warn.user == target.id).count()
         a = s.query(db.WarnAction).filter(db.WarnAction.guild == ctx.guild.id, db.WarnAction.count == c).first()
@@ -32,96 +35,72 @@ class Warn(commands.Cog):
             elif a.action == "mute":
                 pass  # Integration with upcoming ban & mute extension
 
-    @staticmethod
-    def get_target(ctx: commands.Context, user: str) -> Member:
-        users = {str(m): m for m in ctx.guild.members}
-        if user not in users:
-            raise BadArgument()
-        return users[user]
-
-    @commands.group("warn", pass_context=True)
+    @cog_ext.cog_subcommand(base="warn", name="add", description="Send a warn to a user", options=[
+        manage_commands.create_option("user", "The user", SlashCommandOptionType.USER, True),
+        manage_commands.create_option("description", "The description", SlashCommandOptionType.STRING, True)
+    ])
     @is_enabled()
-    @commands.guild_only()
-    #@commands.has_permissions(manage_roles=True, kick_members=True, ban_members=True, mute_members=True)
-    async def warn(self, ctx: commands.Context):
-        if ctx.invoked_subcommand is None:
-            await ctx.invoke(self.warn_help)
-
-    @warn.group("help", pass_context=True)
-    async def warn_help(self, ctx: commands.Context):
-        embed = Embed(title="Warn help")
-        embed.add_field(name="add <user> <description>", value="Send a warn to a user", inline=False)
-        embed.add_field(name="remove <user> <number>", value="Remove a number of warn to a user", inline=False)
-        embed.add_field(name="purge <user>", value="Remove all warn of a user", inline=False)
-        embed.add_field(name="list [user#discriminator|actions]", value="List warn of the guild or a specified user\n"
-                                                                        "If you specify `actions` instead of a user, "
-                                                                        "all the actions of the guild will be listed",
-                        inline=False)
-        embed.add_field(name="action <count> <action>", value="Set an action for a count of warn\n"
-                                                              "Actions: `mute<time>`, `kick`, `ban[time]`, `nothing`\n"
-                                                              "Time: `?D?H?M?S`\n"
-                                                              "Example: `action 1 mute1H` to mute someone for one hour "
-                                                              "after only one war\n"
-                                                              "or `action 3 ban1D` to ban someone for one day after 3 "
-                                                              "warns", inline=False)
-        await ctx.send(embed=embed)
-
-    @warn.group("add", pass_context=True)
-    async def warn_add(self, ctx: commands.Context, user: str, description: str):
-        target = self.get_target(ctx, user)
-
+    @guild_only()
+    @has_permissions(kick_members=True, ban_members=True, mute_members=True)
+    async def warn_add(self, ctx: SlashContext, user: Member, description: str):
         s = db.Session()
-        s.add(db.Warn(target.id, ctx.author.id, ctx.guild.id, description))
+        s.add(db.Warn(user.id, ctx.author.id, ctx.guild.id, description))
         s.commit()
         s.close()
 
         try:
             embed = Embed(title="You get warned !", description="A moderator send you a warn", color=0xff0000)
             embed.add_field(name="Description:", value=description)
-            await target.send(embed=embed)
+            await user.send(embed=embed)
         except Forbidden:
-            await ctx.send("Fail to send warn notification to the user, DM close :warning:")
+            await ctx.send(content="Fail to send warn notification to the user, DM close :warning:")
         else:
-            await ctx.message.add_reaction("\U0001f44d")
-        await self.check_warn(ctx, target)
+            await ctx.send(content="\U0001f44d")
+        await self.check_warn(ctx, user)
 
-    @warn.group("remove", pass_context=True)
-    async def warn_remove(self, ctx: commands.Context, user: str, number: int):
-        target = self.get_target(ctx, user)
+    @cog_ext.cog_subcommand(base="warn", name="remove", description="Remove a number of warn to a user", options=[
+        manage_commands.create_option("user", "The user", SlashCommandOptionType.USER, True),
+        manage_commands.create_option("number", "The warn to remove", SlashCommandOptionType.INTEGER, True)
+    ])
+    @is_enabled()
+    @guild_only()
+    @has_permissions(kick_members=True, ban_members=True, mute_members=True)
+    async def warn_remove(self, ctx: SlashContext, user: Member, number: int):
         s = db.Session()
-        ws = s.query(db.Warn).filter(db.Warn.guild == ctx.guild.id, db.Warn.user == target.id).all()
+        ws = s.query(db.Warn).filter(db.Warn.guild == ctx.guild.id, db.Warn.user == user.id).all()
         if number <= 0 or number > len(ws):
             raise BadArgument()
         s.delete(ws[number-1])
         s.commit()
         s.close()
-        await ctx.message.add_reaction("\U0001f44d")
+        await ctx.send(content="\U0001f44d")
 
-    @warn.group("purge", pass_context=True)
-    async def warn_purge(self, ctx: commands.Context, user: str):
-        target = self.get_target(ctx, user)
+    @cog_ext.cog_subcommand(base="warn", name="purge", description="Remove all warn of a user", options=[
+        manage_commands.create_option("user", "The user", SlashCommandOptionType.USER, True)])
+    @is_enabled()
+    @guild_only()
+    @has_permissions(kick_members=True, ban_members=True, mute_members=True)
+    async def warn_purge(self, ctx: SlashContext, user: Member):
         s = db.Session()
-        for w in s.query(db.Warn).filter(db.Warn.guild == ctx.guild.id, db.Warn.user == target.id).all():
+        for w in s.query(db.Warn).filter(db.Warn.guild == ctx.guild.id, db.Warn.user == user.id).all():
             s.delete(w)
         s.commit()
         s.close()
-        await ctx.message.add_reaction("\U0001f44d")
+        await ctx.send(content="\U0001f44d")
 
-    @warn.group("list", pass_context=True)
-    async def warn_list(self, ctx: commands.Context, user: str = None):
+    @cog_ext.cog_subcommand(base="warn", name="list", description="List warn of the guild or a specified user",
+                            options=[
+                                manage_commands.create_option("user", "The user", SlashCommandOptionType.USER, False)
+                            ])
+    @is_enabled()
+    @guild_only()
+    @has_permissions(kick_members=True, ban_members=True, mute_members=True)
+    async def warn_list(self, ctx: SlashContext, user: Member = None):
         s = db.Session()
         embed = Embed(title="Warn list")
         ws = {}
-
-        if user == "actions":
-            embed.title = "Actions list"
-            for a in s.query(db.WarnAction).filter(db.WarnAction.guild == ctx.guild.id).order_by(db.WarnAction.count)\
-                    .all():
-                action = f"{a.action} for {seconds_to_time_string(a.duration)}" if a.duration else a.action
-                embed.add_field(name=f"{a.count} warn(s)", value=action, inline=False)
-        elif user:
-            target = self.get_target(ctx, user)
-            ws[target.id] = s.query(db.Warn).filter(db.Warn.guild == ctx.guild.id, db.Warn.user == target.id).all()
+        if user:
+            ws[user.id] = s.query(db.Warn).filter(db.Warn.guild == ctx.guild.id, db.Warn.user == user.id).all()
         else:
             for w in s.query(db.Warn).filter(db.Warn.guild == ctx.guild.id).all():
                 if w.user not in ws:
@@ -134,10 +113,45 @@ class Warn(commands.Cog):
                      for w in ws[u]]
             embed.add_field(name=self.bot.get_user(u), value="\n".join(warns), inline=False)
 
-        await ctx.send(embed=embed)
+        await ctx.send(embeds=[embed])
 
-    @warn.group("action", pass_context=True)
-    async def warn_action(self, ctx: commands.Context, count: int, action: str):
+    @cog_ext.cog_subcommand(base="warn", name="actions", description="List all the actions of the guild")
+    @is_enabled()
+    @guild_only()
+    @has_permissions(kick_members=True, ban_members=True, mute_members=True)
+    async def warn_actions(self, ctx: SlashContext):
+        s = db.Session()
+        embed = Embed(title="Warn list")
+        ws = {}
+        embed.title = "Actions list"
+        for a in s.query(db.WarnAction).filter(db.WarnAction.guild == ctx.guild.id).order_by(db.WarnAction.count) \
+                .all():
+            action = f"{a.action} for {seconds_to_time_string(a.duration)}" if a.duration else a.action
+            embed.add_field(name=f"{a.count} warn(s)", value=action, inline=False)
+        s.close()
+
+        for u in ws:
+            warns = [f"{self.bot.get_user(w.author).mention} - {w.date.strftime('%d/%m/%Y %H:%M')}```{w.description}```"
+                     for w in ws[u]]
+            embed.add_field(name=self.bot.get_user(u), value="\n".join(warns), inline=False)
+
+        await ctx.send(embeds=[embed])
+
+    @cog_ext.cog_subcommand(base="warn", name="action", description="Set an action for a count of warn", options=[
+        manage_commands.create_option("count", "The number of warns", SlashCommandOptionType.INTEGER, True),
+        manage_commands.create_option("action", "The action", SlashCommandOptionType.STRING, True, [
+            manage_commands.create_choice("mute", "mute"),
+            manage_commands.create_choice("kick", "kick"),
+            manage_commands.create_choice("ban", "ban"),
+            manage_commands.create_choice("nothing", "nothing")
+        ]),
+        manage_commands.create_option("time", "The duration of the action, ?D?H?M?S",
+                                      SlashCommandOptionType.STRING, False)
+    ])
+    @is_enabled()
+    @guild_only()
+    @has_permissions(administrator=True)
+    async def warn_action(self, ctx: SlashContext, count: int, action: str, time: str = None):
         if count <= 0 or\
                 (action not in ["kick", "nothing"] and not action.startswith("mute") and not action.startswith("ban")):
             raise BadArgument()
@@ -151,14 +165,8 @@ class Warn(commands.Cog):
             else:
                 raise BadArgument()
         else:
-            time = None
-            if action.startswith("mute"):
-                time = time_pars(action.replace("mute", "")).total_seconds()
-                action = "mute"
-            elif action.startswith("ban"):
-                if action[3:]:
-                    time = time_pars(action.replace("ban", "")).total_seconds()
-                    action = "ban"
+            if time:
+                time = time_pars(time).total_seconds()
             if a:
                 a.action = action
                 a.duration = time
@@ -167,7 +175,7 @@ class Warn(commands.Cog):
 
         s.commit()
         s.close()
-        await ctx.message.add_reaction("\U0001f44d")
+        await ctx.send(content="\U0001f44d")
 
     @commands.Cog.listener()
     async def on_guild_remove(self, guild: Guild):