diff --git a/docs/src/django-settings.md b/docs/src/django-settings.md
index 8efbf6ce..b9344512 100644
--- a/docs/src/django-settings.md
+++ b/docs/src/django-settings.md
@@ -138,8 +138,9 @@ def force_download_pdfs(headers, path, url):
         url: The host-relative URL of the file e.g. `/static/styles/app.css`
 
     """
-    if path.endswith('.pdf'):
-        headers['Content-Disposition'] = 'attachment'
+    if path.endswith(".pdf"):
+        headers["Content-Disposition"] = "attachment"
+
 
 SERVESTATIC_ADD_HEADERS_FUNCTION = force_download_pdfs
 ```
@@ -167,7 +168,8 @@ def immutable_file_test(path, url):
     """
     # Match filename with 12 hex digits before the extension
     # e.g. app.db8f2edc0c8a.js
-    return re.match(r'^.+\.[0-9a-f]{12}\..+$', url)
+    return re.match(r"^.+\.[0-9a-f]{12}\..+$", url)
+
 
 SERVESTATIC_IMMUTABLE_FILE_TEST = immutable_file_test
 ```
diff --git a/docs/src/servestatic.md b/docs/src/servestatic.md
index 48589780..0632a913 100644
--- a/docs/src/servestatic.md
+++ b/docs/src/servestatic.md
@@ -58,7 +58,7 @@ If you want to something other than `index.html` as the index file, then you can
 A dictionary mapping file extensions (lowercase) to the mimetype for that extension. For example:
 
 ```python linenums="0"
-{'.foo': 'application/x-foo'}
+{".foo": "application/x-foo"}
 ```
 
 Note that ServeStatic ships with its own default set of mimetypes and does not use the system-supplied ones (e.g. `/etc/mime.types`). This ensures that it behaves consistently regardless of the environment in which it's run. View the defaults in the `media_types.py` file.
@@ -114,13 +114,14 @@ def force_download_pdfs(headers, path, url):
         None. Changes should be made by modifying the headers \
         dictionary directly.
     """
-    if path.endswith('.pdf'):
-        headers['Content-Disposition'] = 'attachment'
+    if path.endswith(".pdf"):
+        headers["Content-Disposition"] = "attachment"
+
 
 application = ServeStatic(
     application,
     add_headers_function=force_download_pdfs,
-    )
+)
 ```
 
 ---
@@ -151,7 +152,7 @@ def immutable_file_test(path, url):
     """
     # Match filename with 12 hex digits before the extension
     # e.g. app.db8f2edc0c8a.js
-    return re.match(r'^.+\.[0-9a-f]{12}\..+$', url)
+    return re.match(r"^.+\.[0-9a-f]{12}\..+$", url)
 ```
 
 ## Compression Support
diff --git a/src/servestatic/base.py b/src/servestatic/base.py
index ab829f5f..db03cbf2 100644
--- a/src/servestatic/base.py
+++ b/src/servestatic/base.py
@@ -9,12 +9,7 @@
 from wsgiref.headers import Headers
 
 from servestatic.media_types import MediaTypes
-from servestatic.responders import (
-    IsDirectoryError,
-    MissingFileError,
-    Redirect,
-    StaticFile,
-)
+from servestatic.responders import IsDirectoryError, MissingFileError, Redirect, StaticFile
 from servestatic.utils import ensure_leading_trailing_slash, scantree
 
 
diff --git a/src/servestatic/middleware.py b/src/servestatic/middleware.py
index ca45990b..81ab9307 100644
--- a/src/servestatic/middleware.py
+++ b/src/servestatic/middleware.py
@@ -11,26 +11,12 @@
 from asgiref.sync import iscoroutinefunction, markcoroutinefunction
 from django.conf import settings as django_settings
 from django.contrib.staticfiles import finders
-from django.contrib.staticfiles.storage import (
-    ManifestStaticFilesStorage,
-    staticfiles_storage,
-)
+from django.contrib.staticfiles.storage import ManifestStaticFilesStorage, staticfiles_storage
 from django.http import FileResponse, HttpRequest
 
-from servestatic.responders import (
-    AsyncSlicedFile,
-    MissingFileError,
-    SlicedFile,
-    StaticFile,
-)
-from servestatic.utils import (
-    AsyncFile,
-    AsyncFileIterator,
-    AsyncToSyncIterator,
-    EmptyAsyncIterator,
-    ensure_leading_trailing_slash,
-    stat_files,
-)
+from servestatic.responders import AsyncSlicedFile, MissingFileError, SlicedFile, StaticFile
+from servestatic.utils import (AsyncFile, AsyncFileIterator, AsyncToSyncIterator,
+                               EmptyAsyncIterator, ensure_leading_trailing_slash, stat_files)
 from servestatic.wsgi import ServeStaticBase
 
 __all__ = ["ServeStaticMiddleware"]
diff --git a/src/servestatic/storage.py b/src/servestatic/storage.py
index adef7ef5..a49c713a 100644
--- a/src/servestatic/storage.py
+++ b/src/servestatic/storage.py
@@ -7,19 +7,17 @@
 import os
 import re
 import textwrap
-from typing import Any, Iterator, Tuple, Union
+from collections.abc import Iterator
+from typing import Any, Tuple, Union
 
 from django.conf import settings
-from django.contrib.staticfiles.storage import (
-    ManifestStaticFilesStorage,
-    StaticFilesStorage,
-)
+from django.contrib.staticfiles.storage import ManifestStaticFilesStorage, StaticFilesStorage
 from django.core.files.base import ContentFile
 
 from servestatic.compress import Compressor
 from servestatic.utils import stat_files
 
-_PostProcessT = Iterator[Union[Tuple[str, str, bool], Tuple[str, None, RuntimeError]]]
+_PostProcessT = Iterator[Union[tuple[str, str, bool], tuple[str, None, RuntimeError]]]
 
 
 class CompressedStaticFilesStorage(StaticFilesStorage):
diff --git a/src/servestatic/utils.py b/src/servestatic/utils.py
index 857b9c85..5f056175 100644
--- a/src/servestatic/utils.py
+++ b/src/servestatic/utils.py
@@ -6,9 +6,10 @@
 import functools
 import os
 import threading
+from collections.abc import AsyncIterable
 from concurrent.futures import ThreadPoolExecutor
 from io import IOBase
-from typing import AsyncIterable, Callable
+from typing import Callable
 
 # This is the same size as wsgiref.FileWrapper
 ASGI_BLOCK_SIZE = 8192
@@ -83,10 +84,11 @@ def __iter__(self):
 
 def open_lazy(f):
     """Decorator that ensures the file is open before calling a function.
-    This can be turned into a @staticmethod on `AsyncFile` once we drop Python 3.9 compatibility."""
+    This can be turned into a @staticmethod on `AsyncFile` once we drop Python 3.9 compatibility.
+    """
 
     @functools.wraps(f)
-    async def wrapper(self: "AsyncFile", *args, **kwargs):
+    async def wrapper(self: AsyncFile, *args, **kwargs):
         if self.closed:
             raise ValueError("I/O operation on closed file.")
         if self.file_obj is None:
diff --git a/tests/test_django_servestatic.py b/tests/test_django_servestatic.py
index 3a19cd65..ff7fcef7 100644
--- a/tests/test_django_servestatic.py
+++ b/tests/test_django_servestatic.py
@@ -23,14 +23,8 @@
 from servestatic.middleware import AsyncServeStaticFileResponse, ServeStaticMiddleware
 from servestatic.utils import AsyncFile
 
-from .utils import (
-    AppServer,
-    AsgiAppServer,
-    AsgiReceiveEmulator,
-    AsgiScopeEmulator,
-    AsgiSendEmulator,
-    Files,
-)
+from .utils import (AppServer, AsgiAppServer, AsgiReceiveEmulator, AsgiScopeEmulator,
+                    AsgiSendEmulator, Files)
 
 
 def reset_lazy_object(obj):