diff --git a/rolo/asgi.py b/rolo/asgi.py
index 827da58..dadbf28 100644
--- a/rolo/asgi.py
+++ b/rolo/asgi.py
@@ -1,4 +1,5 @@
 """This module contains code to make ASGI play nice with WSGI."""
+
 import asyncio
 import io
 import logging
diff --git a/rolo/dispatcher.py b/rolo/dispatcher.py
index 4e816a3..39f9e1c 100644
--- a/rolo/dispatcher.py
+++ b/rolo/dispatcher.py
@@ -1,6 +1,7 @@
 """
 DEPRECATED: use ``from rolo.routing import handler_dispatcher`` instead
 """
+
 from .routing.handler import ResultValue, handler_dispatcher
 
 __all__ = [
diff --git a/rolo/gateway/asgi.py b/rolo/gateway/asgi.py
index 9cb1a30..9baf6e4 100644
--- a/rolo/gateway/asgi.py
+++ b/rolo/gateway/asgi.py
@@ -1,4 +1,5 @@
 """This module provides adapter code to expose a ``Gateway`` as an ASGI compatible application."""
+
 import asyncio
 import concurrent.futures.thread
 from asyncio import AbstractEventLoop
diff --git a/rolo/gateway/chain.py b/rolo/gateway/chain.py
index c36cb1f..580ca9b 100644
--- a/rolo/gateway/chain.py
+++ b/rolo/gateway/chain.py
@@ -1,6 +1,7 @@
 """
 The core concepts of the HandlerChain.
 """
+
 from __future__ import annotations
 
 import logging
diff --git a/rolo/gateway/handlers.py b/rolo/gateway/handlers.py
index f6bb4de..ecce519 100644
--- a/rolo/gateway/handlers.py
+++ b/rolo/gateway/handlers.py
@@ -1,4 +1,5 @@
 """Several gateway handlers"""
+
 import typing as t
 
 from werkzeug.datastructures import Headers, MultiDict
diff --git a/rolo/gateway/wsgi.py b/rolo/gateway/wsgi.py
index d88d39f..f4e12d8 100644
--- a/rolo/gateway/wsgi.py
+++ b/rolo/gateway/wsgi.py
@@ -1,4 +1,5 @@
 """This module contains adapter code that exposes a ``Gateway`` as a WSGI application."""
+
 import typing as t
 
 from werkzeug.datastructures import Headers, MultiDict
diff --git a/rolo/resource.py b/rolo/resource.py
index a5cf578..c30ef1b 100644
--- a/rolo/resource.py
+++ b/rolo/resource.py
@@ -1,6 +1,7 @@
 """
 DEPRECATED: use ``from rolo.routing import Resource, resource`` instead
 """
+
 from .routing.resource import Resource, resource
 
 __all__ = [
diff --git a/rolo/routing/resource.py b/rolo/routing/resource.py
index 29e2f57..84bc050 100644
--- a/rolo/routing/resource.py
+++ b/rolo/routing/resource.py
@@ -13,6 +13,7 @@ def on_post(self, request: Request):
     router = Router(dispatcher=resource_dispatcher())
     router.add(Resource("/foo", Foo())
 """
+
 from typing import Any, Iterable, Optional, Type
 
 from werkzeug.routing import Map, Rule, RuleFactory
diff --git a/rolo/serving/twisted.py b/rolo/serving/twisted.py
index fae8987..e31425f 100644
--- a/rolo/serving/twisted.py
+++ b/rolo/serving/twisted.py
@@ -1,6 +1,7 @@
 """
 Bindings to serve rolo through Twisted.
 """
+
 import logging
 import time
 import typing as t
diff --git a/rolo/testing/pytest.py b/rolo/testing/pytest.py
index 5ca2f76..c7d3424 100644
--- a/rolo/testing/pytest.py
+++ b/rolo/testing/pytest.py
@@ -1,4 +1,5 @@
 """rolo pytest plugin used both for internal testing and as testing library."""
+
 import asyncio
 import dataclasses
 import socket
diff --git a/rolo/websocket/adapter.py b/rolo/websocket/adapter.py
index 1a5314a..f8f780f 100644
--- a/rolo/websocket/adapter.py
+++ b/rolo/websocket/adapter.py
@@ -1,5 +1,6 @@
 """Adapter API between high-level rolo.websocket.request and an underlying IO frameworks like ASGI or
 twisted."""
+
 import dataclasses
 import typing as t
 
diff --git a/rolo/websocket/websocket.py b/rolo/websocket/websocket.py
index db72863..1d4518d 100644
--- a/rolo/websocket/websocket.py
+++ b/rolo/websocket/websocket.py
@@ -1,4 +1,5 @@
 """TODO: remove with release (just keeping this so localstack doesn't blow up)"""
+
 from .adapter import WebSocketEnvironment, WebSocketListener
 from .errors import WebSocketDisconnectedError, WebSocketError, WebSocketProtocolError
 from .request import WebSocket, WebSocketRequest