diff --git a/pyproject.toml b/pyproject.toml
index e88c84fe..3d6a843e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -15,8 +15,6 @@ dependencies = [
     "aiofiles>=24.1.0",
     "aiohttp>=3.11.16",
     "arrow>=1.3.0",
-    "attrs>=25.3.0",
-    "cattrs>=23.1.2",
     "certifi>=2024.7.4",
     "python-dotenv>=1.0.1",
     "yarl>=1.19.0",
diff --git a/src/europython_discord/extensions/organisers/organisers.py b/src/europython_discord/extensions/organisers/organisers.py
index 00c92ec7..ba95eaed 100644
--- a/src/europython_discord/extensions/organisers/organisers.py
+++ b/src/europython_discord/extensions/organisers/organisers.py
@@ -1,22 +1,22 @@
 """Commands for organisers."""
 
+import dataclasses
 import logging
 
-import attrs
 import discord
 from discord.ext import commands
 
-from europython_discord.extensions.organisers import roles
+from europython_discord.extensions.organisers.roles import Roles
 
 _logger = logging.getLogger(f"bot.{__name__}")
 
 
-@attrs.define
 class Organisers(commands.Cog):
     """A cog with commands for organisers."""
 
-    _bot: commands.Bot
-    _roles: roles.Roles
+    def __init__(self, bot: commands.Bot, roles: Roles) -> None:
+        self._bot = bot
+        self._roles = roles
 
     @commands.command(name="participants")
     async def participants(self, ctx: commands.Context) -> None:
@@ -50,7 +50,7 @@ def _get_counts(self, guild: discord.Guild) -> "_RoleCount":
             not_registered=sum(len(m.roles) == 1 for m in guild.members),
             **{
                 role: len(guild.get_role(role_id).members)
-                for role, role_id in attrs.asdict(self._roles).items()
+                for role, role_id in dataclasses.asdict(self._roles).items()
             },
         )
 
@@ -77,7 +77,7 @@ def __hash__(self) -> int:
         return hash(id(self))
 
 
-@attrs.define(frozen=True)
+@dataclasses.dataclass(frozen=True)
 class _RoleCount:
     """Counts of members."""
 
diff --git a/src/europython_discord/extensions/organisers/roles.py b/src/europython_discord/extensions/organisers/roles.py
index c500464b..49135e86 100644
--- a/src/europython_discord/extensions/organisers/roles.py
+++ b/src/europython_discord/extensions/organisers/roles.py
@@ -1,9 +1,9 @@
 """Data structure for role IDs."""
 
-import attrs
+import dataclasses
 
 
-@attrs.define
+@dataclasses.dataclass
 class Roles:
     """Role mapping for the organisers extension."""
 
diff --git a/uv.lock b/uv.lock
index c94944fc..0a5f0a21 100644
--- a/uv.lock
+++ b/uv.lock
@@ -200,18 +200,6 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/5d/35/be73b6015511aa0173ec595fc579133b797ad532996f2998fd6b8d1bbe6b/audioop_lts-0.2.1-cp313-cp313t-win_arm64.whl", hash = "sha256:78bfb3703388c780edf900be66e07de5a3d4105ca8e8720c5c4d67927e0b15d0", size = 23918 },
 ]
 
-[[package]]
-name = "cattrs"
-version = "24.1.3"
-source = { registry = "https://pypi.org/simple" }
-dependencies = [
-    { name = "attrs" },
-]
-sdist = { url = "https://files.pythonhosted.org/packages/29/7b/da4aa2f95afb2f28010453d03d6eedf018f9e085bd001f039e15731aba89/cattrs-24.1.3.tar.gz", hash = "sha256:981a6ef05875b5bb0c7fb68885546186d306f10f0f6718fe9b96c226e68821ff", size = 426684 }
-wheels = [
-    { url = "https://files.pythonhosted.org/packages/3c/ee/d68a3de23867a9156bab7e0a22fb9a0305067ee639032a22982cf7f725e7/cattrs-24.1.3-py3-none-any.whl", hash = "sha256:adf957dddd26840f27ffbd060a6c4dd3b2192c5b7c2c0525ef1bd8131d8a83f5", size = 66462 },
-]
-
 [[package]]
 name = "certifi"
 version = "2025.1.31"
@@ -335,8 +323,6 @@ dependencies = [
     { name = "aiofiles" },
     { name = "aiohttp" },
     { name = "arrow" },
-    { name = "attrs" },
-    { name = "cattrs" },
     { name = "certifi" },
     { name = "discord-py" },
     { name = "pydantic" },
@@ -359,8 +345,6 @@ requires-dist = [
     { name = "aiofiles", specifier = ">=24.1.0" },
     { name = "aiohttp", specifier = ">=3.11.16" },
     { name = "arrow", specifier = ">=1.3.0" },
-    { name = "attrs", specifier = ">=25.3.0" },
-    { name = "cattrs", specifier = ">=23.1.2" },
     { name = "certifi", specifier = ">=2024.7.4" },
     { name = "discord-py", specifier = ">=2.3.1" },
     { name = "pydantic", specifier = ">=2.8.2" },