diff --git a/composed_configuration/_allauth.py b/composed_configuration/_allauth.py
index 0ae64e9..69e0fdb 100644
--- a/composed_configuration/_allauth.py
+++ b/composed_configuration/_allauth.py
@@ -1,5 +1,3 @@
-from typing import Type
-
 from ._base import ComposedConfiguration, ConfigMixin
 
 
@@ -11,7 +9,7 @@ class AllauthMixin(ConfigMixin):
     """
 
     @staticmethod
-    def mutate_configuration(configuration: Type[ComposedConfiguration]) -> None:
+    def mutate_configuration(configuration: type[ComposedConfiguration]) -> None:
         configuration.INSTALLED_APPS += [
             'django.contrib.sites',
             'allauth',
diff --git a/composed_configuration/_allauth_support/createsuperuser.py b/composed_configuration/_allauth_support/createsuperuser.py
index cd9137f..4b423e4 100644
--- a/composed_configuration/_allauth_support/createsuperuser.py
+++ b/composed_configuration/_allauth_support/createsuperuser.py
@@ -1,6 +1,6 @@
 from __future__ import annotations
 
-from typing import ClassVar, List, Optional
+from typing import ClassVar
 
 from django.contrib.auth.management.commands import createsuperuser
 from django.contrib.auth.models import User, UserManager
@@ -30,9 +30,9 @@ class EmailAsUsernameProxyUserManager(UserManager):
     # This version of "create_superuser" makes the "username" argument optional
     def create_superuser(
         self,
-        username: Optional[str] = None,
-        email: Optional[str] = None,
-        password: Optional[str] = None,
+        username: str | None = None,
+        email: str | None = None,
+        password: str | None = None,
         **extra_fields,
     ) -> EmailAsUsernameProxyUser:
         # Practically, email will always be provided
@@ -55,7 +55,7 @@ class Meta(User.Meta):
 
     # Don't include "email" in "REQUIRED_FIELDS", to prevent adding that field twice to the
     # "createsuperuser.Command" argument parser
-    REQUIRED_FIELDS: ClassVar[List[str]] = []
+    REQUIRED_FIELDS: ClassVar[list[str]] = []
 
     @classmethod
     def normalize_username(cls, username: str) -> str:
diff --git a/composed_configuration/_allauth_support/management/commands/createsuperuser.py b/composed_configuration/_allauth_support/management/commands/createsuperuser.py
index 741a79f..0fda7d0 100644
--- a/composed_configuration/_allauth_support/management/commands/createsuperuser.py
+++ b/composed_configuration/_allauth_support/management/commands/createsuperuser.py
@@ -1,4 +1,4 @@
-from typing import Type, cast
+from typing import cast
 
 from allauth.account import app_settings as allauth_settings
 from django.contrib.auth import get_user_model
@@ -20,13 +20,13 @@
 # If using email as username
 if not allauth_settings.USERNAME_REQUIRED:
     # Expose the modified command
-    Command: Type[BaseCommand] = allauth_support_createsuperuser.Command
-    user_model: Type[AbstractUser] = allauth_support_createsuperuser.EmailAsUsernameProxyUser
+    Command: type[BaseCommand] = allauth_support_createsuperuser.Command
+    user_model: type[AbstractUser] = allauth_support_createsuperuser.EmailAsUsernameProxyUser
 
 else:
     # Expose the pristine upstream version of the command
     Command = django_createsuperuser.Command
-    user_model = cast(Type[AbstractUser], get_user_model())
+    user_model = cast(type[AbstractUser], get_user_model())
 
 # Always automatically verify email addresses of newly created superusers
 post_save.connect(verify_email_address_on_user_post_save, sender=user_model)
diff --git a/composed_configuration/_allauth_support/receiver.py b/composed_configuration/_allauth_support/receiver.py
index 5aa0f6b..b1e6179 100644
--- a/composed_configuration/_allauth_support/receiver.py
+++ b/composed_configuration/_allauth_support/receiver.py
@@ -1,5 +1,4 @@
 import logging
-from typing import Type
 
 from allauth.account.models import EmailAddress
 from django.contrib.auth.models import AbstractUser
@@ -8,7 +7,7 @@
 
 
 def verify_email_address_on_user_post_save(
-    sender: Type[AbstractUser],
+    sender: type[AbstractUser],
     instance: AbstractUser,
     created: bool,
     **kwargs,
diff --git a/composed_configuration/_base.py b/composed_configuration/_base.py
index ed3bf52..3b05664 100644
--- a/composed_configuration/_base.py
+++ b/composed_configuration/_base.py
@@ -1,5 +1,4 @@
 import contextlib
-from typing import Type
 import warnings
 
 from configurations import Configuration, values
@@ -62,7 +61,7 @@ class ConfigMixin:
     """Abstract mixin for composable Config sections."""
 
     @staticmethod
-    def mutate_configuration(configuration: Type[ComposedConfiguration]) -> None:
+    def mutate_configuration(configuration: type[ComposedConfiguration]) -> None:
         """
         Mutate the configuration before values are fully bound with environment variables.
 
diff --git a/composed_configuration/_configuration.py b/composed_configuration/_configuration.py
index a00d902..046521b 100644
--- a/composed_configuration/_configuration.py
+++ b/composed_configuration/_configuration.py
@@ -1,5 +1,3 @@
-from typing import List, Optional, Tuple
-
 from configurations import values
 
 from ._allauth import AllauthMixin
@@ -68,7 +66,7 @@ class TestingBaseConfiguration(MinioStorageMixin, _BaseConfiguration):
     SECRET_KEY = 'testingsecret'
 
     # Testing will add 'testserver' to ALLOWED_HOSTS
-    ALLOWED_HOSTS: List[str] = []
+    ALLOWED_HOSTS: list[str] = []
 
     MINIO_STORAGE_MEDIA_BUCKET_NAME = 'test-django-storage'
 
@@ -97,7 +95,7 @@ class _HerokuMixin:
         environ_name='CLOUDAMQP_URL', environ_prefix=None, environ_required=True
     )
     # https://help.heroku.com/J2R1S4T8/can-heroku-force-an-application-to-use-ssl-tls
-    SECURE_PROXY_SSL_HEADER: Optional[Tuple[str, str]] = ('HTTP_X_FORWARDED_PROTO', 'https')
+    SECURE_PROXY_SSL_HEADER: tuple[str, str] | None = ('HTTP_X_FORWARDED_PROTO', 'https')
     # This may be provided by https://github.com/ianpurvis/heroku-buildpack-version or similar
     # The commit SHA is the preferred release tag for Git-based projects:
     # https://docs.sentry.io/platforms/python/configuration/releases/#bind-the-version
diff --git a/composed_configuration/_cors.py b/composed_configuration/_cors.py
index f21df62..2a2c568 100644
--- a/composed_configuration/_cors.py
+++ b/composed_configuration/_cors.py
@@ -1,5 +1,3 @@
-from typing import Type
-
 from configurations import values
 
 from ._base import ComposedConfiguration, ConfigMixin
@@ -18,7 +16,7 @@ class CorsMixin(ConfigMixin):
     """
 
     @staticmethod
-    def mutate_configuration(configuration: Type[ComposedConfiguration]) -> None:
+    def mutate_configuration(configuration: type[ComposedConfiguration]) -> None:
         configuration.INSTALLED_APPS += ['corsheaders']
 
         # CorsMiddleware must be added immediately before WhiteNoiseMiddleware, so this can
diff --git a/composed_configuration/_database.py b/composed_configuration/_database.py
index 19bf1fb..718dd20 100644
--- a/composed_configuration/_database.py
+++ b/composed_configuration/_database.py
@@ -1,5 +1,3 @@
-from typing import Type
-
 from configurations import values
 
 from ._base import ComposedConfiguration, ConfigMixin
@@ -16,7 +14,7 @@ class DatabaseMixin(ConfigMixin):
     """
 
     @staticmethod
-    def mutate_configuration(configuration: Type[ComposedConfiguration]) -> None:
+    def mutate_configuration(configuration: type[ComposedConfiguration]) -> None:
         configuration.INSTALLED_APPS += ['django.contrib.postgres']
 
     # This cannot have a default value, since the password and database
diff --git a/composed_configuration/_debug.py b/composed_configuration/_debug.py
index 2ae00fb..6bd24dd 100644
--- a/composed_configuration/_debug.py
+++ b/composed_configuration/_debug.py
@@ -1,5 +1,3 @@
-from typing import Type
-
 from ._base import ComposedConfiguration, ConfigMixin
 
 
@@ -11,7 +9,7 @@ class DebugMixin(ConfigMixin):
     """
 
     @staticmethod
-    def mutate_configuration(configuration: Type[ComposedConfiguration]) -> None:
+    def mutate_configuration(configuration: type[ComposedConfiguration]) -> None:
         configuration.INSTALLED_APPS += ['debug_toolbar']
 
         # Include Debug Toolbar middleware as early as possible in the list.
diff --git a/composed_configuration/_django.py b/composed_configuration/_django.py
index fc72d63..2b063ad 100644
--- a/composed_configuration/_django.py
+++ b/composed_configuration/_django.py
@@ -1,4 +1,4 @@
-from typing import NoReturn, Type
+from typing import NoReturn
 
 from configurations import values
 
@@ -21,7 +21,7 @@ class DjangoMixin(ConfigMixin):
     """
 
     @staticmethod
-    def mutate_configuration(configuration: Type[ComposedConfiguration]) -> None:
+    def mutate_configuration(configuration: type[ComposedConfiguration]) -> None:
         # These are often extended, so update their values to avoid fragility due to mixin ordering
         configuration.INSTALLED_APPS += [
             'django.contrib.admin',
diff --git a/composed_configuration/_docker.py b/composed_configuration/_docker.py
index c9f272e..2d8b281 100644
--- a/composed_configuration/_docker.py
+++ b/composed_configuration/_docker.py
@@ -21,7 +21,7 @@ def _is_docker() -> bool:
     return False
 
 
-class _AlwaysContains(object):
+class _AlwaysContains:
     """An object which always returns True for `x in _AlwaysContains()` operations."""
 
     def __contains__(self, item) -> bool:
diff --git a/composed_configuration/_email.py b/composed_configuration/_email.py
index d0ced01..8ec9637 100644
--- a/composed_configuration/_email.py
+++ b/composed_configuration/_email.py
@@ -1,4 +1,4 @@
-from typing import Dict, Type, cast
+from typing import cast
 
 from configurations import values
 
@@ -23,9 +23,9 @@ class SmtpEmailMixin(_EmailMixin):
     """
 
     @staticmethod
-    def mutate_configuration(configuration: Type[ComposedConfiguration]) -> None:
+    def mutate_configuration(configuration: type[ComposedConfiguration]) -> None:
         email = cast(
-            Dict[str, str],
+            dict[str, str],
             values.EmailURLValue(
                 environ_name='EMAIL_URL',
                 environ_prefix='DJANGO',
diff --git a/composed_configuration/_extensions.py b/composed_configuration/_extensions.py
index 42a6434..0f1e946 100644
--- a/composed_configuration/_extensions.py
+++ b/composed_configuration/_extensions.py
@@ -1,5 +1,3 @@
-from typing import Type
-
 from ._base import ComposedConfiguration, ConfigMixin
 
 
@@ -11,7 +9,7 @@ class ExtensionsMixin(ConfigMixin):
     """
 
     @staticmethod
-    def mutate_configuration(configuration: Type[ComposedConfiguration]) -> None:
+    def mutate_configuration(configuration: type[ComposedConfiguration]) -> None:
         configuration.INSTALLED_APPS += ['django_extensions']
 
     SHELL_PLUS_PRINT_SQL = True
diff --git a/composed_configuration/_filter.py b/composed_configuration/_filter.py
index 08a06f2..3b348c8 100644
--- a/composed_configuration/_filter.py
+++ b/composed_configuration/_filter.py
@@ -1,5 +1,3 @@
-from typing import Type
-
 from ._base import ComposedConfiguration, ConfigMixin
 
 
@@ -11,5 +9,5 @@ class FilterMixin(ConfigMixin):
     """
 
     @staticmethod
-    def mutate_configuration(configuration: Type[ComposedConfiguration]) -> None:
+    def mutate_configuration(configuration: type[ComposedConfiguration]) -> None:
         configuration.INSTALLED_APPS += ['django_filters']
diff --git a/composed_configuration/_girder_utils.py b/composed_configuration/_girder_utils.py
index 00342d3..0859110 100644
--- a/composed_configuration/_girder_utils.py
+++ b/composed_configuration/_girder_utils.py
@@ -1,5 +1,3 @@
-from typing import Type
-
 from ._base import ComposedConfiguration, ConfigMixin
 
 
@@ -11,5 +9,5 @@ class GirderUtilsMixin(ConfigMixin):
     """
 
     @staticmethod
-    def mutate_configuration(configuration: Type[ComposedConfiguration]) -> None:
+    def mutate_configuration(configuration: type[ComposedConfiguration]) -> None:
         configuration.INSTALLED_APPS += ['girder_utils']
diff --git a/composed_configuration/_https.py b/composed_configuration/_https.py
index e45ad76..f2f8474 100644
--- a/composed_configuration/_https.py
+++ b/composed_configuration/_https.py
@@ -1,5 +1,3 @@
-from typing import Optional, Tuple
-
 from ._base import ConfigMixin
 
 
@@ -9,7 +7,7 @@ class HttpsMixin(ConfigMixin):
     SECURE_SSL_REDIRECT = True
 
     # This must be set when deployed behind a proxy
-    SECURE_PROXY_SSL_HEADER: Optional[Tuple[str, str]] = None
+    SECURE_PROXY_SSL_HEADER: tuple[str, str] | None = None
 
     SESSION_COOKIE_SECURE = True
     CSRF_COOKIE_SECURE = True
diff --git a/composed_configuration/_logging.py b/composed_configuration/_logging.py
index edf2df4..649aa70 100644
--- a/composed_configuration/_logging.py
+++ b/composed_configuration/_logging.py
@@ -1,5 +1,4 @@
 import logging
-from typing import Optional
 
 from django.http import HttpRequest
 
@@ -8,7 +7,7 @@
 
 def _filter_favicon_requests(record: logging.LogRecord) -> bool:
     if record.name == 'django.request':
-        request: Optional[HttpRequest] = getattr(record, 'request', None)
+        request: HttpRequest | None = getattr(record, 'request', None)
         if request and request.path == '/favicon.ico':
             return False
 
diff --git a/composed_configuration/_rest_framework.py b/composed_configuration/_rest_framework.py
index fd43b7d..7f22493 100644
--- a/composed_configuration/_rest_framework.py
+++ b/composed_configuration/_rest_framework.py
@@ -1,4 +1,4 @@
-from typing import Any, Dict, Type
+from typing import Any
 
 from ._base import ComposedConfiguration, ConfigMixin
 
@@ -12,7 +12,7 @@ class RestFrameworkMixin(ConfigMixin):
     """
 
     @staticmethod
-    def mutate_configuration(configuration: Type[ComposedConfiguration]) -> None:
+    def mutate_configuration(configuration: type[ComposedConfiguration]) -> None:
         configuration.INSTALLED_APPS += [
             'rest_framework',
             'rest_framework.authtoken',
@@ -106,7 +106,7 @@ def mutate_configuration(configuration: Type[ComposedConfiguration]) -> None:
         'REFRESH_TOKEN_EXPIRE_SECONDS': 30 * 24 * 60 * 60,
     }
 
-    SWAGGER_SETTINGS: Dict[str, Any] = {
+    SWAGGER_SETTINGS: dict[str, Any] = {
         # The default security definition ("basic") is not supported by this DRF configuration,
         # so expect all logins to come via the Django session, which there's no OpenAPI
         # security definition for.
@@ -114,4 +114,4 @@ def mutate_configuration(configuration: Type[ComposedConfiguration]) -> None:
         'USE_SESSION_AUTH': True,
     }
 
-    REDOC_SETTINGS: Dict[str, Any] = {}
+    REDOC_SETTINGS: dict[str, Any] = {}
diff --git a/composed_configuration/_sentry.py b/composed_configuration/_sentry.py
index 58b687e..008d153 100644
--- a/composed_configuration/_sentry.py
+++ b/composed_configuration/_sentry.py
@@ -1,5 +1,3 @@
-from typing import Type
-
 from configurations import values
 
 from ._base import ComposedConfiguration, ConfigMixin
@@ -18,7 +16,7 @@ class SentryMixin(ConfigMixin):
     """
 
     @staticmethod
-    def mutate_configuration(configuration: Type[ComposedConfiguration]) -> None:
+    def mutate_configuration(configuration: type[ComposedConfiguration]) -> None:
         configuration.INSTALLED_APPS += [
             'composed_configuration.sentry.apps.SentryConfig',
         ]
diff --git a/composed_configuration/_static.py b/composed_configuration/_static.py
index bec0dc2..62078bc 100644
--- a/composed_configuration/_static.py
+++ b/composed_configuration/_static.py
@@ -1,5 +1,4 @@
 from pathlib import Path
-from typing import Type
 
 from ._base import ComposedConfiguration, ConfigMixin
 from ._values import DirectoryPathValue
@@ -41,7 +40,7 @@ def STATIC_ROOT(self):  # noqa: N802
         )
 
     @staticmethod
-    def mutate_configuration(configuration: Type[ComposedConfiguration]) -> None:
+    def mutate_configuration(configuration: type[ComposedConfiguration]) -> None:
         configuration.INSTALLED_APPS += ['django.contrib.staticfiles']
 
 
@@ -53,7 +52,7 @@ class WhitenoiseStaticFileMixin(StaticFileMixin):
     """
 
     @staticmethod
-    def mutate_configuration(configuration: Type[ComposedConfiguration]) -> None:
+    def mutate_configuration(configuration: type[ComposedConfiguration]) -> None:
         # Insert immediately before staticfiles app
         staticfiles_index = configuration.INSTALLED_APPS.index('django.contrib.staticfiles')
         configuration.INSTALLED_APPS.insert(staticfiles_index, 'whitenoise.runserver_nostatic')