diff --git a/.codecov.yml b/.codecov.yml
deleted file mode 100644
index 36883d7e..00000000
--- a/.codecov.yml
+++ /dev/null
@@ -1,11 +0,0 @@
-codecov:
-  ci:
-    - "!ci.appveyor.com"
-coverage:
-  status:
-    patch: false
-    project:
-      default:
-        target: 90
-
-comment: false
diff --git a/.github/workflows/autofix.yml b/.github/workflows/autofix.yml
index 6bcd2625..b1a0a025 100644
--- a/.github/workflows/autofix.yml
+++ b/.github/workflows/autofix.yml
@@ -6,18 +6,24 @@ jobs:
   style:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
-      - name: Setup Python
-        uses: actions/setup-python@v5
+      - name: Download source
+        uses: actions/checkout@v6
+      - name: Install Python
+        uses: actions/setup-python@v6
         with:
-          python-version: '3.11'
-      - name: Install Python dependencies
+          python-version: '3.13'
+      - name: Install Hatch
         run: |
-          python -m pip install --upgrade hatch
+          pip install hatch
+      - name: Install dependencies
+        run: |
+          hatch run style:pip freeze
       - name: Fix code style
-        run: hatch run style:fix --fix-only
+        run: |
+          hatch run style:fix --fix-only
       - name: Check if any edits are necessary
-        run: git diff --color --exit-code
+        run: |
+          git diff --color --exit-code
       - name: Apply automatic fixes using pre-commit-ci-lite
         if: failure() && github.event_name == 'pull_request'
-        uses: pre-commit-ci/lite-action@v1.0.1
+        uses: pre-commit-ci/lite-action@5d6cc0eb514c891a40562a58a8e71576c5c7fb43 # v1.1.0
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 51cada0c..111353d9 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -4,72 +4,92 @@ on:
   pull_request:
   schedule:
     - cron: '0 6 * * 6'
+defaults:
+  run:
+    shell: bash
 jobs:
   test:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ['3.8', '3.9', '3.10', '3.11', '3.12', 'pypy-3.9-v7.x']
-        os: [ubuntu-latest, windows-latest, macos-latest]
         include:
-          - python-version: pypy-3.9-v7.x
-            py: pypy3
-        # Just to slim down the test matrix:
-        exclude:
-          - python-version: '3.9'
+          - python: '3.14'
+            os: ubuntu-latest
+          - python: '3.14'
+            os: windows-latest
+          - python: '3.14'
+            os: macos-latest
+          - python: '3.13'
+            os: ubuntu-latest
+          - python: '3.13'
+            os: windows-latest
+          - python: '3.12'
             os: macos-latest
-          - python-version: '3.9'
+          - python: '3.12'
+            os: ubuntu-latest
+          - python: '3.12'
             os: windows-latest
-          - python-version: '3.10'
+          - python: '3.11'
+            os: ubuntu-latest
+          - python: '3.11'
+            os: macos-latest
+          - python: '3.10'
             os: ubuntu-latest
-          - python-version: '3.11'
+          - python: '3.10'
             os: macos-latest
-          - python-version: '3.11'
+          - python: '3.9'
             os: windows-latest
-    runs-on: ${{ matrix.os }}
+          - python: '3.9'
+            os: ubuntu-latest
+            versions: minimal
+    runs-on: ${{matrix.os}}
     steps:
-      - uses: actions/checkout@v4
-      - name: Setup Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v5
+      - name: Download source
+        uses: actions/checkout@v6
+      - name: Install Python
+        uses: actions/setup-python@v6
         with:
-          python-version: ${{ matrix.python-version }}
+          python-version: ${{matrix.python}}
+      - name: Pin to lowest versions
+        if: matrix.versions == 'minimal'
+        run: |
+          sed -i -E 's/#min //; s/\b >=([0-9])/ ==\1/' pyproject.toml
+      - name: Install Hatch
+        run: |
+          pip install hatch
       - name: Install dependencies
         run: |
-          python -m pip install --upgrade hatch
+          hatch run test:pip freeze
       - name: Run tests
         run: |
-          hatch run +py=${{ matrix.py || matrix.python-version }} test:with-coverage
+          hatch run +py=${{matrix.python}} test:test
       - name: Run integration tests
+        if: matrix.versions != 'minimal'
         run: |
-          hatch run +py=${{ matrix.py || matrix.python-version }} integration:test
-        shell: bash
-      - name: Upload Codecov Results
-        if: success()
-        uses: codecov/codecov-action@v3
-        with:
-          file: ./coverage.xml
-          flags: unittests
-          name: ${{ matrix.os }}/${{ matrix.python-version }}
-          fail_ci_if_error: false
-
-  lint:
+          hatch run +py=${{matrix.python}} integration:test
+  style:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
-      - name: Setup Python
-        uses: actions/setup-python@v5
+      - name: Download source
+        uses: actions/checkout@v6
+      - name: Install Python
+        uses: actions/setup-python@v6
         with:
-          python-version: '3.11'
-      - name: Install Python dependencies
+          python-version: '3.13'
+      - name: Install Hatch
         run: |
-          python -m pip install --upgrade hatch
-      - name: Setup Node
-        uses: actions/setup-node@v4
+          pip install hatch
+      - name: Install Node
+        uses: actions/setup-node@v6
         with:
-          node-version: 20
+          node-version: 24
+      - name: Install dependencies
+        run: |
+          hatch run style:pip freeze
+          hatch run types:pip freeze
       - name: Check with ruff
         if: always()
-        run: hatch run style:lint
+        run: hatch run style:check
       - name: Check with mypy
         if: always()
         run: hatch run types:check
@@ -86,11 +106,11 @@ jobs:
   package:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - name: Setup Python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
-          python-version: '3.11'
+          python-version: '3.13'
       - name: Install dependencies
         run: pip install -U build
       - name: Build package
diff --git a/.github/workflows/deploy-docs.yml b/.github/workflows/deploy-docs.yml
new file mode 100644
index 00000000..6c71103b
--- /dev/null
+++ b/.github/workflows/deploy-docs.yml
@@ -0,0 +1,38 @@
+name: Deploy docs
+on:
+  push:
+  pull_request:
+  schedule:
+    - cron: '0 6 * * 6'
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Download source
+        uses: actions/checkout@v6
+      - name: Install Python
+        uses: actions/setup-python@v6
+        with:
+          python-version: '3.13'
+      - name: Install dependencies
+        run: pip install --no-deps -r requirements/requirements-docs.txt && pip install .
+      - name: Build site
+        run: properdocs build --strict
+      - name: Upload to GitHub Pages
+        uses: actions/upload-pages-artifact@v4
+        with:
+          path: site
+  deploy:
+    if: github.event_name == 'push' && github.ref_name == github.event.repository.default_branch
+    needs: build
+    permissions:
+      pages: write
+      id-token: write
+    runs-on: ubuntu-latest
+    steps:
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v4
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
diff --git a/.github/workflows/deploy-release.yml b/.github/workflows/deploy-release.yml
index 7db41a5c..fa736720 100644
--- a/.github/workflows/deploy-release.yml
+++ b/.github/workflows/deploy-release.yml
@@ -9,11 +9,11 @@ jobs:
       id-token: write
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - name: Setup Python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
-          python-version: '3.11'
+          python-version: '3.13'
       - name: Install dependencies
         run: pip install -U build
       - name: Build package
diff --git a/.github/workflows/docs.yml b/.github/workflows/docs.yml
deleted file mode 100644
index 5c5d028e..00000000
--- a/.github/workflows/docs.yml
+++ /dev/null
@@ -1,20 +0,0 @@
-name: Docs
-on:
-  push:
-  pull_request:
-  schedule:
-    - cron: '0 6 * * 6'
-jobs:
-  build:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Download source
-        uses: actions/checkout@v4
-      - name: Install Python
-        uses: actions/setup-python@v5
-        with:
-          python-version: '3.11'
-      - name: Install dependencies
-        run: pip install --no-deps -r requirements/requirements-docs.txt
-      - name: Build site
-        run: properdocs build --strict
diff --git a/README.md b/README.md
index a63d6605..1f001fed 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,6 @@
 
 [![PyPI Version][pypi-v-image]][pypi-v-link]
 [![Build Status][GHAction-image]][GHAction-link]
-[![Coverage Status][codecov-image]][codecov-link]
 
 ProperDocs is a **fast**, **simple** and **downright gorgeous** static site
 generator that's geared towards building project documentation. Documentation
@@ -58,8 +57,6 @@ Everyone interacting in the ProperDocs project's codebases, issue trackers, and
 discussion forums is expected to follow the [PyPA Code of Conduct].
 
 <!-- Badges -->
-[codecov-image]: https://codecov.io/github/properdocs/properdocs/coverage.svg?branch=master
-[codecov-link]: https://codecov.io/github/properdocs/properdocs?branch=master
 [pypi-v-image]: https://img.shields.io/pypi/v/properdocs.svg
 [pypi-v-link]: https://pypi.org/project/properdocs/
 [GHAction-image]: https://github.com/properdocs/properdocs/actions/workflows/ci.yml/badge.svg
diff --git a/properdocs/__main__.py b/properdocs/__main__.py
index 8e700a6d..bd0c5795 100644
--- a/properdocs/__main__.py
+++ b/properdocs/__main__.py
@@ -12,8 +12,12 @@
 
 import click
 
-from properdocs import replacement  # noqa: F401
-from properdocs import __version__, config, utils
+from properdocs import (
+    __version__,
+    config,
+    replacement,  # noqa: F401
+    utils,
+)
 
 if sys.platform.startswith("win"):
     try:
@@ -122,16 +126,13 @@ def __del__(self):
 reload_help = "Enable the live reloading in the development server (this is the default)"
 no_reload_help = "Disable the live reloading in the development server."
 serve_dirty_help = "Only re-build files that have changed."
-serve_clean_help = (
-    "Build the site without any effects of `properdocs serve` - pure `properdocs build`, then serve."
-)
+serve_clean_help = "Build the site without any effects of `properdocs serve` - pure `properdocs build`, then serve."
 commit_message_help = (
     "A commit message to use when committing to the "
     "GitHub Pages remote branch. Commit {sha} and ProperDocs {version} are available as expansions"
 )
 remote_branch_help = (
-    "The remote branch to commit to for GitHub Pages. This "
-    "overrides the value specified in config"
+    "The remote branch to commit to for GitHub Pages. This overrides the value specified in config"
 )
 remote_name_help = (
     "The remote name to commit to for GitHub Pages. This overrides the value specified in config"
@@ -243,7 +244,7 @@ def callback(ctx, param, value):
     __version__,
     '-V',
     '--version',
-    message=f'%(prog)s, version %(version)s from { PKG_DIR } (Python { PYTHON_VERSION })',
+    message=f'%(prog)s, version %(version)s from {PKG_DIR} (Python {PYTHON_VERSION})',
 )
 @common_options
 @color_option
diff --git a/properdocs/commands/build.py b/properdocs/commands/build.py
index 217a38d2..de2c946e 100644
--- a/properdocs/commands/build.py
+++ b/properdocs/commands/build.py
@@ -4,7 +4,8 @@
 import logging
 import os
 import time
-from typing import TYPE_CHECKING, Sequence
+from collections.abc import Sequence
+from typing import TYPE_CHECKING
 from urllib.parse import urljoin, urlsplit
 
 import jinja2
@@ -16,8 +17,10 @@
 from properdocs.structure.files import File, Files, InclusionLevel, get_files, set_exclusions
 from properdocs.structure.nav import Navigation, get_navigation
 from properdocs.structure.pages import Page
-from properdocs.utils import DuplicateFilter  # noqa: F401 - legacy re-export
-from properdocs.utils import templates
+from properdocs.utils import (
+    DuplicateFilter,  # noqa: F401 - legacy re-export
+    templates,
+)
 
 if TYPE_CHECKING:
     from properdocs.config.defaults import ProperDocsConfig
diff --git a/properdocs/config/base.py b/properdocs/config/base.py
index 558f24a4..6fbf69eb 100644
--- a/properdocs/config/base.py
+++ b/properdocs/config/base.py
@@ -6,20 +6,9 @@
 import sys
 import warnings
 from collections import UserDict
+from collections.abc import Iterator, Mapping, Sequence
 from contextlib import contextmanager
-from typing import (
-    IO,
-    TYPE_CHECKING,
-    Any,
-    Generic,
-    Iterator,
-    List,
-    Mapping,
-    Sequence,
-    Tuple,
-    TypeVar,
-    overload,
-)
+from typing import IO, TYPE_CHECKING, Any, Generic, TypeVar, overload
 
 from properdocs import exceptions, utils
 from properdocs.utils import weak_property
@@ -86,12 +75,10 @@ def __set_name__(self, owner, name):
         self._name = name
 
     @overload
-    def __get__(self, obj: Config, type=None) -> T:
-        ...
+    def __get__(self, obj: Config, type=None) -> T: ...
 
     @overload
-    def __get__(self, obj, type=None) -> BaseConfigOption:
-        ...
+    def __get__(self, obj, type=None) -> BaseConfigOption: ...
 
     def __get__(self, obj, type=None):
         if not isinstance(obj, Config):
@@ -113,11 +100,11 @@ def __eq__(self, other):
         return type(self) is type(other) and str(self) == str(other)
 
 
-PlainConfigSchemaItem = Tuple[str, BaseConfigOption]
+PlainConfigSchemaItem = tuple[str, BaseConfigOption]
 PlainConfigSchema = Sequence[PlainConfigSchemaItem]
 
-ConfigErrors = List[Tuple[str, Exception]]
-ConfigWarnings = List[Tuple[str, str]]
+ConfigErrors = list[tuple[str, Exception]]
+ConfigWarnings = list[tuple[str, str]]
 
 
 class Config(UserDict):
@@ -270,7 +257,7 @@ def user_configs(self) -> Sequence[Mapping[str, Any]]:
         return self.__user_configs
 
 
-@functools.lru_cache(maxsize=None)
+@functools.cache
 def get_schema(cls: type) -> PlainConfigSchema:
     """Extract ConfigOptions defined in a class (used just as a container) and put them into a schema tuple."""
     if issubclass(cls, Config):
diff --git a/properdocs/config/config_options.py b/properdocs/config/config_options.py
index 0902e1fa..6f936e81 100644
--- a/properdocs/config/config_options.py
+++ b/properdocs/config/config_options.py
@@ -10,22 +10,9 @@
 import types
 import warnings
 from collections import Counter, UserString
+from collections.abc import Collection, Iterator, Mapping, MutableMapping
 from types import SimpleNamespace
-from typing import (
-    Any,
-    Callable,
-    Collection,
-    Dict,
-    Generic,
-    Iterator,
-    List,
-    Mapping,
-    MutableMapping,
-    NamedTuple,
-    TypeVar,
-    Union,
-    overload,
-)
+from typing import Any, Callable, Generic, NamedTuple, TypeVar, Union, overload
 from urllib.parse import quote as urlquote
 from urllib.parse import urlsplit, urlunsplit
 
@@ -154,12 +141,10 @@ class OptionallyRequired(Generic[T], BaseConfigOption[T]):
     """
 
     @overload
-    def __init__(self, default=None):
-        ...
+    def __init__(self, default=None): ...
 
     @overload
-    def __init__(self, default=None, *, required: bool):
-        ...
+    def __init__(self, default=None, *, required: bool): ...
 
     def __init__(self, default=None, required=None):
         super().__init__()
@@ -186,7 +171,7 @@ def validate(self, value):
         return self.run_validation(value)
 
 
-class ListOfItems(Generic[T], BaseConfigOption[List[T]]):
+class ListOfItems(Generic[T], BaseConfigOption[list[T]]):
     """
     Validates a homogeneous list of items.
 
@@ -241,7 +226,7 @@ def run_validation(self, value: object) -> list[T]:
         return [fake_config[k] for k in fake_keys]
 
 
-class DictOfItems(Generic[T], BaseConfigOption[Dict[str, T]]):
+class DictOfItems(Generic[T], BaseConfigOption[dict[str, T]]):
     """
     Validates a dict of items. Keys are always strings.
 
@@ -307,12 +292,10 @@ class ConfigItems(ListOfItems[LegacyConfig]):
     """
 
     @overload
-    def __init__(self, *config_options: PlainConfigSchemaItem):
-        ...
+    def __init__(self, *config_options: PlainConfigSchemaItem): ...
 
     @overload
-    def __init__(self, *config_options: PlainConfigSchemaItem, required: bool):
-        ...
+    def __init__(self, *config_options: PlainConfigSchemaItem, required: bool): ...
 
     def __init__(self, *config_options: PlainConfigSchemaItem, required=None) -> None:
         super().__init__(SubConfig(*config_options), default=[])
@@ -328,12 +311,10 @@ class Type(Generic[T], OptionallyRequired[T]):
     """
 
     @overload
-    def __init__(self, type_: type[T], /, length: int | None = None, **kwargs):
-        ...
+    def __init__(self, type_: type[T], /, length: int | None = None, **kwargs): ...
 
     @overload
-    def __init__(self, type_: tuple[type[T], ...], /, length: int | None = None, **kwargs):
-        ...
+    def __init__(self, type_: tuple[type[T], ...], /, length: int | None = None, **kwargs): ...
 
     def __init__(self, type_, /, length=None, **kwargs) -> None:
         super().__init__(**kwargs)
@@ -497,12 +478,10 @@ class URL(OptionallyRequired[str]):
     """
 
     @overload
-    def __init__(self, default=None, *, is_dir: bool = False):
-        ...
+    def __init__(self, default=None, *, is_dir: bool = False): ...
 
     @overload
-    def __init__(self, default=None, *, required: bool, is_dir: bool = False):
-        ...
+    def __init__(self, default=None, *, required: bool, is_dir: bool = False): ...
 
     def __init__(self, default=None, required=None, is_dir: bool = False) -> None:
         self.is_dir = is_dir
@@ -759,12 +738,10 @@ class ListOfPaths(ListOfItems[str]):
     """
 
     @overload
-    def __init__(self, default=[]):
-        ...
+    def __init__(self, default=[]): ...
 
     @overload
-    def __init__(self, default=[], *, required: bool):
-        ...
+    def __init__(self, default=[], *, required: bool): ...
 
     def __init__(self, default=[], required=None) -> None:
         super().__init__(FilesystemObject(exists=True), default)
@@ -952,7 +929,7 @@ def run_validation(self, value: object) -> ExtraScriptValue | str:
         return self.option_type.run_validation(value)
 
 
-class MarkdownExtensions(OptionallyRequired[List[str]]):
+class MarkdownExtensions(OptionallyRequired[list[str]]):
     """
     Markdown Extensions Config Option.
 
@@ -1088,8 +1065,7 @@ def _parse_configs(cls, value: list | tuple | dict) -> Iterator[tuple[str, dict]
     def load_plugin_with_namespace(self, name: str, config) -> tuple[str, plugins.BasePlugin]:
         if '/' in name:  # It's already specified with a namespace.
             # Special case: allow to explicitly skip namespaced loading:
-            if name.startswith('/'):
-                name = name[1:]
+            name = name.removeprefix('/')
         else:
             # Attempt to load with prepended namespace for the current theme.
             if self.theme_key and self._config:
@@ -1165,7 +1141,7 @@ def load_plugin(self, name: str, config) -> plugins.BasePlugin:
         return plugin
 
 
-class Hooks(BaseConfigOption[List[types.ModuleType]]):
+class Hooks(BaseConfigOption[list[types.ModuleType]]):
     """A list of Python scripts to be treated as instances of plugins."""
 
     def __init__(self, plugins_key: str) -> None:
@@ -1187,7 +1163,7 @@ def run_validation(self, value: object) -> Mapping[str, Any]:
             hooks[name] = self._load_hook(name, path)
         return hooks
 
-    @functools.lru_cache(maxsize=None)
+    @functools.cache
     def _load_hook(self, name, path):
         import importlib.util
 
diff --git a/properdocs/config/defaults.py b/properdocs/config/defaults.py
index a14fc4bf..3614f74d 100644
--- a/properdocs/config/defaults.py
+++ b/properdocs/config/defaults.py
@@ -1,7 +1,8 @@
 from __future__ import annotations
 
 import logging
-from typing import IO, Dict, Mapping
+from collections.abc import Mapping
+from typing import IO
 
 from properdocs.config import base
 from properdocs.config import config_options as c
@@ -134,7 +135,7 @@ class ProperDocsConfig(base.Config):
     )
     """PyMarkdown extension names."""
 
-    mdx_configs = c.Private[Dict[str, dict]]()
+    mdx_configs = c.Private[dict[str, dict]]()
     """PyMarkdown extension configs. Populated from `markdown_extensions`."""
 
     strict = c.Type(bool, default=False)
diff --git a/properdocs/contrib/search/__init__.py b/properdocs/contrib/search/__init__.py
index 5b939a83..ba6d9d47 100644
--- a/properdocs/contrib/search/__init__.py
+++ b/properdocs/contrib/search/__init__.py
@@ -2,7 +2,7 @@
 
 import logging
 import os
-from typing import TYPE_CHECKING, List
+from typing import TYPE_CHECKING
 
 from properdocs import utils
 from properdocs.config import base
@@ -20,7 +20,7 @@
 base_path = os.path.dirname(os.path.abspath(__file__))
 
 
-class LangOption(c.OptionallyRequired[List[str]]):
+class LangOption(c.OptionallyRequired[list[str]]):
     """Validate Language(s) provided in config are known languages."""
 
     def get_lunr_supported_lang(self, lang):
diff --git a/properdocs/livereload/__init__.py b/properdocs/livereload/__init__.py
index 7f71566c..f9e0a0b2 100644
--- a/properdocs/livereload/__init__.py
+++ b/properdocs/livereload/__init__.py
@@ -21,7 +21,8 @@
 import webbrowser
 import wsgiref.simple_server
 import wsgiref.util
-from typing import Any, BinaryIO, Callable, Iterable
+from collections.abc import Iterable
+from typing import Any, BinaryIO, Callable
 
 import watchdog.events
 import watchdog.observers.polling
diff --git a/properdocs/localization.py b/properdocs/localization.py
index 41b5f702..abcc7b06 100644
--- a/properdocs/localization.py
+++ b/properdocs/localization.py
@@ -2,7 +2,8 @@
 
 import logging
 import os
-from typing import TYPE_CHECKING, Sequence
+from collections.abc import Sequence
+from typing import TYPE_CHECKING
 
 from jinja2.ext import Extension, InternationalizationExtension
 
diff --git a/properdocs/plugins.py b/properdocs/plugins.py
index e121d373..ff1b347f 100644
--- a/properdocs/plugins.py
+++ b/properdocs/plugins.py
@@ -4,7 +4,8 @@
 
 import logging
 import sys
-from typing import TYPE_CHECKING, Any, Callable, Generic, Literal, MutableMapping, TypeVar, overload
+from collections.abc import MutableMapping
+from typing import TYPE_CHECKING, Any, Callable, Generic, Literal, TypeVar, overload
 
 if sys.version_info >= (3, 10):
     from importlib.metadata import EntryPoint, entry_points
@@ -45,7 +46,7 @@
 
 def get_plugins() -> dict[str, EntryPoint]:
     """Return a dict of all installed Plugins as {name: EntryPoint}."""
-    pluginmaps = {'properdocs': {}, 'mkdocs': {}}
+    pluginmaps: dict[str, dict[str, EntryPoint]] = {'properdocs': {}, 'mkdocs': {}}
 
     for prefix in pluginmaps:
         for plugin in entry_points(group=f'{prefix}.plugins'):
@@ -548,12 +549,10 @@ def __setitem__(self, key: str, value: BasePlugin) -> None:
                 self._register_event(event_name[3:], method, plugin_name=key)
 
     @overload
-    def run_event(self, name: str, **kwargs) -> Any:
-        ...
+    def run_event(self, name: str, **kwargs) -> Any: ...
 
     @overload
-    def run_event(self, name: str, item: T, **kwargs) -> T:
-        ...
+    def run_event(self, name: str, item: T, **kwargs) -> T: ...
 
     def run_event(self, name: str, item=None, **kwargs):
         """
diff --git a/properdocs/structure/__init__.py b/properdocs/structure/__init__.py
index d7ad60a9..636e7f98 100644
--- a/properdocs/structure/__init__.py
+++ b/properdocs/structure/__init__.py
@@ -1,7 +1,8 @@
 from __future__ import annotations
 
 import abc
-from typing import TYPE_CHECKING, Iterable
+from collections.abc import Iterable
+from typing import TYPE_CHECKING
 
 if TYPE_CHECKING:
     from properdocs.structure.nav import Section
@@ -11,8 +12,7 @@ class StructureItem(metaclass=abc.ABCMeta):
     """An item in ProperDocs structure - see concrete subclasses Section, Page or Link."""
 
     @abc.abstractmethod
-    def __init__(self):
-        ...
+    def __init__(self): ...
 
     parent: Section | None = None
     """The immediate parent of the item in the site navigation. `None` if it's at the top level."""
diff --git a/properdocs/structure/files.py b/properdocs/structure/files.py
index a384af22..67c372bc 100644
--- a/properdocs/structure/files.py
+++ b/properdocs/structure/files.py
@@ -7,9 +7,10 @@
 import posixpath
 import shutil
 import warnings
+from collections.abc import Iterable, Iterator, Mapping, Sequence
 from functools import cached_property
 from pathlib import PurePath, PurePosixPath
-from typing import TYPE_CHECKING, Callable, Iterable, Iterator, Mapping, Sequence, overload
+from typing import TYPE_CHECKING, Callable, overload
 from urllib.parse import quote as urlquote
 
 import pathspec
diff --git a/properdocs/structure/nav.py b/properdocs/structure/nav.py
index 435e965e..d6bd8d1b 100644
--- a/properdocs/structure/nav.py
+++ b/properdocs/structure/nav.py
@@ -1,7 +1,8 @@
 from __future__ import annotations
 
 import logging
-from typing import TYPE_CHECKING, Iterator, TypeVar
+from collections.abc import Iterator
+from typing import TYPE_CHECKING, TypeVar
 from urllib.parse import urlsplit
 
 from properdocs.exceptions import BuildError
diff --git a/properdocs/structure/pages.py b/properdocs/structure/pages.py
index 63ef132b..8e141a0c 100644
--- a/properdocs/structure/pages.py
+++ b/properdocs/structure/pages.py
@@ -4,21 +4,20 @@
 import logging
 import posixpath
 import warnings
-from typing import TYPE_CHECKING, Any, Callable, Iterator, MutableMapping, Sequence
+from collections.abc import Iterator, MutableMapping, Sequence
+from typing import TYPE_CHECKING, Any, Callable
 from urllib.parse import unquote as urlunquote
 from urllib.parse import urljoin, urlsplit, urlunsplit
 
 import markdown
-import markdown.extensions.toc
 import markdown.htmlparser  # type: ignore
-import markdown.postprocessors
 import markdown.treeprocessors
 from markdown.util import AMP_SUBSTITUTE
 
 from properdocs import utils
 from properdocs.structure import StructureItem
 from properdocs.structure.toc import get_toc
-from properdocs.utils import _removesuffix, get_build_date, get_markdown_title, meta, weak_property
+from properdocs.utils import get_build_date, get_markdown_title, meta, weak_property
 from properdocs.utils.rendering import get_heading_text
 
 if TYPE_CHECKING:
@@ -408,7 +407,7 @@ def _possible_target_uris(
             and not path.endswith('.md')
             and (use_directory_urls or not path.endswith('/'))
         ):
-            suffixes.append(lambda p: _removesuffix(p, '.html') + '.md')
+            suffixes.append(lambda p: p.removesuffix('.html') + '.md')
 
         for pref in prefixes:
             for suf in suffixes:
@@ -534,7 +533,9 @@ def run(self, lines: list[str]) -> list[str]:
 
     def _register(self, md: markdown.Markdown) -> None:
         md.preprocessors.register(
-            self, "properdocs_raw_html", priority=21  # Right before 'html_block'.
+            self,
+            "properdocs_raw_html",
+            priority=21,  # Right before 'html_block'.
         )
 
 
@@ -563,7 +564,11 @@ def run(self, root: etree.Element) -> etree.Element:
 
     def _register(self, md: markdown.Markdown) -> None:
         self.md = md
-        md.treeprocessors.register(self, "properdocs_extract_title", priority=1)  # Close to the end.
+        md.treeprocessors.register(
+            self,
+            "properdocs_extract_title",
+            priority=1,  # Close to the end.
+        )
 
 
 class _AbsoluteLinksValidationValue(enum.IntEnum):
diff --git a/properdocs/structure/toc.py b/properdocs/structure/toc.py
index e1df40be..7a72f5a9 100644
--- a/properdocs/structure/toc.py
+++ b/properdocs/structure/toc.py
@@ -5,9 +5,11 @@
 generate a list of dicts for each toc item, and then store it as AnchorLinks to
 maintain compatibility with older versions of MkDocs.
 """
+
 from __future__ import annotations
 
-from typing import Iterable, Iterator, TypedDict
+from collections.abc import Iterable, Iterator
+from typing import TypedDict
 
 
 class _TocToken(TypedDict):
diff --git a/properdocs/tests/config/base_tests.py b/properdocs/tests/config/base_tests.py
index 11a44c8f..f7af072f 100644
--- a/properdocs/tests/config/base_tests.py
+++ b/properdocs/tests/config/base_tests.py
@@ -2,9 +2,8 @@
 import unittest
 
 from properdocs import exceptions
-from properdocs.config import base
+from properdocs.config import base, defaults
 from properdocs.config import config_options as c
-from properdocs.config import defaults
 from properdocs.config.base import ValidationError
 from properdocs.tests.base import change_dir, tempdir
 
diff --git a/properdocs/tests/config/config_options_tests.py b/properdocs/tests/config/config_options_tests.py
index c97a572b..26d63939 100644
--- a/properdocs/tests/config/config_options_tests.py
+++ b/properdocs/tests/config/config_options_tests.py
@@ -9,7 +9,7 @@
 import sys
 import textwrap
 import unittest
-from typing import TYPE_CHECKING, Any, Dict, List, Optional, TypeVar, Union
+from typing import TYPE_CHECKING, Any, Optional, TypeVar, Union
 from unittest import mock
 
 if TYPE_CHECKING:
@@ -584,7 +584,7 @@ class Schema(Config):
             option = c.ListOfItems(c.Type(int))
 
         conf = self.get_config(Schema, {'option': [1, 2, 3]})
-        assert_type(conf.option, List[int])
+        assert_type(conf.option, list[int])
         self.assertEqual(conf.option, [1, 2, 3])
 
         with self.expect_error(
@@ -609,7 +609,7 @@ class Schema(Config):
             option = c.ListOfItems(c.Type(int), default=[])
 
         conf = self.get_config(Schema, {})
-        assert_type(conf.option, List[int])
+        assert_type(conf.option, list[int])
         self.assertEqual(conf.option, [])
 
         with self.expect_error(option="Required configuration not provided."):
@@ -633,7 +633,7 @@ class Schema(Config):
             option = c.Optional(c.ListOfItems(c.Type(str)))
 
         conf = self.get_config(Schema, {})
-        assert_type(conf.option, Optional[List[str]])
+        assert_type(conf.option, Optional[list[str]])
         self.assertEqual(conf.option, None)
 
         conf = self.get_config(Schema, {'option': None})
@@ -647,7 +647,7 @@ class Schema(Config):
             option = c.ListOfItems(c.Optional(c.Type(int)), default=[])
 
         conf = self.get_config(Schema, {})
-        assert_type(conf.option, List[Optional[int]])
+        assert_type(conf.option, list[Optional[int]])
         self.assertEqual(conf.option, [])
 
         conf = self.get_config(Schema, {'option': [4, None]})
@@ -691,7 +691,7 @@ class Schema(Config):
             option = c.ListOfItems(c.ExtraScript(), default=[])
 
         conf = self.get_config(Schema, {'option': ['foo.js', {'path': 'bar.js', 'async': True}]})
-        assert_type(conf.option, List[Union[c.ExtraScriptValue, str]])
+        assert_type(conf.option, list[Union[c.ExtraScriptValue, str]])
         self.assertEqual(len(conf.option), 2)
         self.assertIsInstance(conf.option[1], c.ExtraScriptValue)
         self.assertEqual(
@@ -709,7 +709,7 @@ class Schema(Config):
         conf = self.get_config(
             Schema, {'option': ['foo.mjs', {'path': 'bar.js', 'type': 'module'}]}
         )
-        assert_type(conf.option, List[Union[c.ExtraScriptValue, str]])
+        assert_type(conf.option, list[Union[c.ExtraScriptValue, str]])
         self.assertEqual(len(conf.option), 2)
         self.assertIsInstance(conf.option[0], c.ExtraScriptValue)
         self.assertEqual(
@@ -750,7 +750,7 @@ class Schema(Config):
             option = c.DictOfItems(c.Type(int))
 
         conf = self.get_config(Schema, {'option': {"a": 1, "b": 2}})
-        assert_type(conf.option, Dict[str, int])
+        assert_type(conf.option, dict[str, int])
         self.assertEqual(conf.option, {"a": 1, "b": 2})
 
         with self.expect_error(
@@ -775,7 +775,7 @@ class Schema(Config):
             option = c.DictOfItems(c.Type(int), default={})
 
         conf = self.get_config(Schema, {})
-        assert_type(conf.option, Dict[str, int])
+        assert_type(conf.option, dict[str, int])
         self.assertEqual(conf.option, {})
 
         with self.expect_error(option="Required configuration not provided."):
@@ -799,7 +799,7 @@ class Schema(Config):
             option = c.Optional(c.DictOfItems(c.Type(str)))
 
         conf = self.get_config(Schema, {})
-        assert_type(conf.option, Optional[Dict[str, str]])
+        assert_type(conf.option, Optional[dict[str, str]])
         self.assertEqual(conf.option, None)
 
         conf = self.get_config(Schema, {'option': None})
@@ -813,7 +813,7 @@ class Schema(Config):
             option = c.DictOfItems(c.Optional(c.Type(int)), default={})
 
         conf = self.get_config(Schema, {})
-        assert_type(conf.option, Dict[str, Optional[int]])
+        assert_type(conf.option, dict[str, Optional[int]])
         self.assertEqual(conf.option, {})
 
         conf = self.get_config(Schema, {'option': {"a": 1, "b": None}})
@@ -1014,7 +1014,7 @@ class Schema(Config):
             option = c.ListOfPaths()
 
         conf = self.get_config(Schema, {'option': []})
-        assert_type(conf.option, List[str])
+        assert_type(conf.option, list[str])
         self.assertEqual(conf.option, [])
 
     def test_none(self) -> None:
@@ -1040,7 +1040,7 @@ class Schema(Config):
             option = c.ListOfPaths()
 
         conf = self.get_config(Schema, {'option': paths})
-        assert_type(conf.option, List[str])
+        assert_type(conf.option, list[str])
 
     @tempdir()
     def test_paths_localized_to_config(self, base_path) -> None:
@@ -1459,7 +1459,7 @@ class Schema(Config):
                 ]
             },
         )
-        assert_type(conf.the_items, List[Sub])
+        assert_type(conf.the_items, list[Sub])
         self.assertEqual(conf.the_items, [{'value': 'a'}, {'value': 'b'}])
         assert_type(conf.the_items[1].value, str)
         self.assertEqual(conf.the_items[1].value, 'b')
@@ -1478,7 +1478,7 @@ class Schema(Config):
         self.assertEqual(conf.sub, None)
 
         conf = self.get_config(Schema, {'sub': [{'opt': 1}, {}]})
-        assert_type(conf.sub, Optional[List[Sub]])
+        assert_type(conf.sub, Optional[list[Sub]])
         self.assertEqual(conf.sub, [{'opt': 1}, {'opt': None}])
         assert conf.sub is not None
         assert_type(conf.sub[0].opt, Optional[int])
@@ -1510,7 +1510,7 @@ class Schema(Config):
         conf = self.get_config(Schema, {'sub': []})
 
         conf = self.get_config(Schema, {'sub': [{'opt': 1}, {'opt': 2}]})
-        assert_type(conf.sub, List[Sub])
+        assert_type(conf.sub, list[Sub])
         self.assertEqual(conf.sub, [{'opt': 1}, {'opt': 2}])
         assert_type(conf.sub[0].opt, int)
         self.assertEqual(conf.sub[0].opt, 1)
@@ -1539,7 +1539,7 @@ class Schema(Config):
             sub = c.ListOfItems(c.SubConfig(Sub), default=[])
 
         conf = self.get_config(Schema, {})
-        assert_type(conf.sub, List[Sub])
+        assert_type(conf.sub, list[Sub])
         self.assertEqual(conf.sub, [])
 
         with self.expect_error(sub="Required configuration not provided."):
@@ -1660,14 +1660,14 @@ class MarkdownExtensionsTest(TestCase):
     def test_simple_list(self) -> None:
         class Schema(Config):
             markdown_extensions = c.MarkdownExtensions()
-            mdx_configs = c.Private[Dict[str, dict]]()
+            mdx_configs = c.Private[dict[str, dict]]()
 
         config = {
             'markdown_extensions': ['foo', 'bar'],
         }
         conf = self.get_config(Schema, config)
-        assert_type(conf.markdown_extensions, List[str])
-        assert_type(conf.mdx_configs, Dict[str, dict])
+        assert_type(conf.markdown_extensions, list[str])
+        assert_type(conf.mdx_configs, dict[str, dict])
         self.assertEqual(conf.markdown_extensions, ['foo', 'bar'])
         self.assertEqual(conf.mdx_configs, {})
 
@@ -1675,7 +1675,7 @@ class Schema(Config):
     def test_list_dicts(self) -> None:
         class Schema(Config):
             markdown_extensions = c.MarkdownExtensions()
-            mdx_configs = c.Private[Dict[str, dict]]()
+            mdx_configs = c.Private[dict[str, dict]]()
 
         config = {
             'markdown_extensions': [
@@ -1698,7 +1698,7 @@ class Schema(Config):
     def test_mixed_list(self) -> None:
         class Schema(Config):
             markdown_extensions = c.MarkdownExtensions()
-            mdx_configs = c.Private[Dict[str, dict]]()
+            mdx_configs = c.Private[dict[str, dict]]()
 
         config = {
             'markdown_extensions': [
@@ -1719,7 +1719,7 @@ class Schema(Config):
     def test_dict_of_dicts(self) -> None:
         class Schema(Config):
             markdown_extensions = c.MarkdownExtensions()
-            mdx_configs = c.Private[Dict[str, dict]]()
+            mdx_configs = c.Private[dict[str, dict]]()
 
         config = {
             'markdown_extensions': {
@@ -1742,7 +1742,7 @@ class Schema(Config):
     def test_builtins(self) -> None:
         class Schema(Config):
             markdown_extensions = c.MarkdownExtensions(builtins=['meta', 'toc'])
-            mdx_configs = c.Private[Dict[str, dict]]()
+            mdx_configs = c.Private[dict[str, dict]]()
 
         config = {
             'markdown_extensions': ['foo', 'bar'],
@@ -1754,7 +1754,7 @@ class Schema(Config):
     def test_duplicates(self) -> None:
         class Schema(Config):
             markdown_extensions = c.MarkdownExtensions(builtins=['meta', 'toc'])
-            mdx_configs = c.Private[Dict[str, dict]]()
+            mdx_configs = c.Private[dict[str, dict]]()
 
         config = {
             'markdown_extensions': ['meta', 'toc'],
@@ -1766,7 +1766,7 @@ class Schema(Config):
     def test_builtins_config(self) -> None:
         class Schema(Config):
             markdown_extensions = c.MarkdownExtensions(builtins=['meta', 'toc'])
-            mdx_configs = c.Private[Dict[str, dict]]()
+            mdx_configs = c.Private[dict[str, dict]]()
 
         config = {
             'markdown_extensions': [
@@ -1781,7 +1781,7 @@ class Schema(Config):
     def test_configkey(self) -> None:
         class Schema(Config):
             markdown_extensions = c.MarkdownExtensions(configkey='bar')
-            bar = c.Private[Dict[str, dict]]()
+            bar = c.Private[dict[str, dict]]()
 
         config = {
             'markdown_extensions': [
@@ -1800,7 +1800,7 @@ class Schema(Config):
     def test_missing_default(self) -> None:
         class Schema(Config):
             markdown_extensions = c.MarkdownExtensions()
-            mdx_configs = c.Private[Dict[str, dict]]()
+            mdx_configs = c.Private[dict[str, dict]]()
 
         conf = self.get_config(Schema, {})
         self.assertEqual(conf.markdown_extensions, [])
@@ -1809,7 +1809,7 @@ class Schema(Config):
     def test_none(self) -> None:
         class Schema(Config):
             markdown_extensions = c.MarkdownExtensions(default=[])
-            mdx_configs = c.Private[Dict[str, dict]]()
+            mdx_configs = c.Private[dict[str, dict]]()
 
         config = {
             'markdown_extensions': None,
@@ -1884,7 +1884,7 @@ def test_multiple_markdown_config_instances(self) -> None:
         # config instances that didn't specify extensions.
         class Schema(Config):
             markdown_extensions = c.MarkdownExtensions()
-            mdx_configs = c.Private[Dict[str, dict]]()
+            mdx_configs = c.Private[dict[str, dict]]()
 
         conf = self.get_config(
             Schema,
@@ -2277,7 +2277,11 @@ class Schema(Config):
         with self.expect_error(plugins="Invalid Plugins configuration"):
             self.get_config(Schema, cfg)
 
-        cfg = {
+    def test_plugin_config_multivalue_dict_empty(self) -> None:
+        class Schema(Config):
+            plugins = c.Plugins()
+
+        cfg: dict[str, list[dict[str, Any]]] = {
             'plugins': [
                 {},
             ],
@@ -2407,7 +2411,7 @@ class B(A):
         self.assertEqual(conf.foo, 1)
         assert_type(conf.bar, Optional[str])
         self.assertEqual(conf.bar, None)
-        assert_type(conf.baz, List[str])
+        assert_type(conf.baz, list[str])
         self.assertEqual(conf.baz, ['b'])
 
         with self.expect_error(baz="Required configuration not provided."):
diff --git a/properdocs/tests/integration.py b/properdocs/tests/integration.py
index 372625b8..ada9a4da 100644
--- a/properdocs/tests/integration.py
+++ b/properdocs/tests/integration.py
@@ -14,7 +14,6 @@
     - Build documentation other than just ProperDocs as it is relatively simple.
 """
 
-
 import logging
 import os
 import subprocess
diff --git a/properdocs/tests/livereload_tests.py b/properdocs/tests/livereload_tests.py
index cbeb494e..d76790ab 100644
--- a/properdocs/tests/livereload_tests.py
+++ b/properdocs/tests/livereload_tests.py
@@ -318,19 +318,19 @@ def test_serves_modified_html(self, site_dir):
             server.watch(site_dir)
 
             headers, output = do_request(server, "GET /normal.html")
-            self.assertRegex(output, fr"^<html><body>hello{SCRIPT_REGEX}</body></html>$")
+            self.assertRegex(output, rf"^<html><body>hello{SCRIPT_REGEX}</body></html>$")
             self.assertEqual(headers.get("content-type"), "text/html")
             self.assertEqual(headers.get("content-length"), str(len(output)))
 
             _, output = do_request(server, "GET /no_body.html")
-            self.assertRegex(output, fr"^<p>hi{SCRIPT_REGEX}$")
+            self.assertRegex(output, rf"^<p>hi{SCRIPT_REGEX}$")
 
             headers, output = do_request(server, "GET /empty.html")
-            self.assertRegex(output, fr"^{SCRIPT_REGEX}$")
+            self.assertRegex(output, rf"^{SCRIPT_REGEX}$")
             self.assertEqual(headers.get("content-length"), str(len(output)))
 
             _, output = do_request(server, "GET /multi_body.html")
-            self.assertRegex(output, fr"^<body>foo</body><body>bar{SCRIPT_REGEX}</body>$")
+            self.assertRegex(output, rf"^<body>foo</body><body>bar{SCRIPT_REGEX}</body>$")
 
     @tempdir({"index.html": "<body>aaa</body>", "foo/index.html": "<body>bbb</body>"})
     def test_serves_directory_index(self, site_dir):
diff --git a/properdocs/theme.py b/properdocs/theme.py
index 7d90a308..65afed8f 100644
--- a/properdocs/theme.py
+++ b/properdocs/theme.py
@@ -3,7 +3,8 @@
 import logging
 import os
 import warnings
-from typing import Any, Collection, MutableMapping
+from collections.abc import Collection, MutableMapping
+from typing import Any
 
 import jinja2
 import yaml
diff --git a/properdocs/utils/__init__.py b/properdocs/utils/__init__.py
index 76cf386e..6bf97ffb 100644
--- a/properdocs/utils/__init__.py
+++ b/properdocs/utils/__init__.py
@@ -4,6 +4,7 @@
 Nothing in this module should have an knowledge of config or the layout
 and structure of the site and pages in the site.
 """
+
 from __future__ import annotations
 
 import functools
@@ -15,9 +16,10 @@
 import sys
 import warnings
 from collections import defaultdict
+from collections.abc import Collection, Iterable, MutableSequence
 from datetime import datetime, timezone
 from pathlib import PurePath
-from typing import TYPE_CHECKING, Collection, Iterable, MutableSequence, TypeVar
+from typing import TYPE_CHECKING, TypeVar
 from urllib.parse import urlsplit
 
 if sys.version_info >= (3, 10):
@@ -83,14 +85,7 @@ def get_build_date() -> str:
     return get_build_datetime().strftime('%Y-%m-%d')
 
 
-if sys.version_info >= (3, 9):
-    _removesuffix = str.removesuffix
-else:
-
-    def _removesuffix(s: str, suffix: str) -> str:
-        if suffix and s.endswith(suffix):
-            return s[: -len(suffix)]
-        return s
+_removesuffix = str.removesuffix
 
 
 def reduce_list(data_set: Iterable[T]) -> list[T]:
@@ -166,7 +161,7 @@ def is_error_template(path: str) -> bool:
     return bool(_ERROR_TEMPLATE_RE.match(path))
 
 
-@functools.lru_cache(maxsize=None)
+@functools.cache
 def _norm_parts(path: str) -> list[str]:
     if not path.startswith('/'):
         path = '/' + path
@@ -216,7 +211,7 @@ def normalize_url(path: str, page: Page | None = None, base: str = '') -> str:
     return posixpath.join(base, path)
 
 
-@functools.lru_cache(maxsize=None)
+@functools.cache
 def _get_norm_url(path: str) -> tuple[str, int]:
     if not path:
         path = '.'
@@ -259,7 +254,7 @@ def get_theme_dir(name: str) -> str:
     return os.path.dirname(os.path.abspath(theme.load().__file__))
 
 
-@functools.lru_cache(maxsize=None)
+@functools.cache
 def get_themes() -> dict[str, EntryPoint]:
     """Return a dict of all installed themes as {name: EntryPoint}."""
     # Ordered set of preferred entry points.
diff --git a/properdocs/utils/cache.py b/properdocs/utils/cache.py
index 9a21feb0..eeb778e8 100644
--- a/properdocs/utils/cache.py
+++ b/properdocs/utils/cache.py
@@ -8,7 +8,9 @@
 
 
 def download_url(url: str) -> bytes:
-    req = urllib.request.Request(url, headers={"User-Agent": f"properdocs/{properdocs.__version__}"})
+    req = urllib.request.Request(
+        url, headers={"User-Agent": f"properdocs/{properdocs.__version__}"}
+    )
     with urllib.request.urlopen(req) as resp:
         return resp.read()
 
diff --git a/properdocs/utils/meta.py b/properdocs/utils/meta.py
index aa9e8980..174adb20 100644
--- a/properdocs/utils/meta.py
+++ b/properdocs/utils/meta.py
@@ -32,6 +32,7 @@
 Extracts, parses and transforms MultiMarkdown style data from documents.
 
 """
+
 from __future__ import annotations
 
 import re
diff --git a/properdocs/utils/templates.py b/properdocs/utils/templates.py
index 1700f4d3..388fc826 100644
--- a/properdocs/utils/templates.py
+++ b/properdocs/utils/templates.py
@@ -1,6 +1,7 @@
 from __future__ import annotations
 
-from typing import TYPE_CHECKING, Sequence, TypedDict
+from collections.abc import Sequence
+from typing import TYPE_CHECKING, TypedDict
 
 if TYPE_CHECKING:
     import datetime
diff --git a/pyproject.toml b/pyproject.toml
index f5454b44..4fe71bac 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -18,20 +18,21 @@ classifiers = [
     "License :: OSI Approved :: BSD License",
     "Operating System :: OS Independent",
     "Programming Language :: Python",
+    # Begin Python versions
     "Programming Language :: Python :: 3",
-    "Programming Language :: Python :: 3.8",
     "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
-    "Programming Language :: Python :: 3 :: Only",
-    "Programming Language :: Python :: Implementation :: CPython",
-    "Programming Language :: Python :: Implementation :: PyPy",
+    "Programming Language :: Python :: 3.13",
+    "Programming Language :: Python :: 3.14",
+    # End Python versions
     "Topic :: Documentation",
     "Topic :: Text Processing",
+    "Typing :: Typed",
 ]
 dynamic = ["version"]
-requires-python = ">=3.8"
+requires-python = ">=3.9"
 dependencies = [
     "click >=7.0",
     "Jinja2 >=2.11.1",
@@ -52,29 +53,12 @@ dependencies = [
 i18n = [
     "babel >=2.9.0",
 ]
-min-versions = [
-    "click ==7.0",
-    "Jinja2 ==2.11.1",
-    "markupsafe ==2.0.1",
-    "Markdown ==3.3.6",
-    "PyYAML ==5.1",
-    "watchdog ==2.0",
-    "ghp-import ==1.0",
-    "pyyaml_env_tag ==0.1",
-    "importlib-metadata ==4.4; python_version < '3.10'",
-    "packaging ==20.5",
-    "mergedeep ==1.3.4",
-    "pathspec ==0.11.1",
-    "mkdocs-get-deps ==0.2.0",
-    "colorama ==0.4; platform_system == 'Windows'",
-    "babel ==2.9.0",
-]
 
 [project.urls]
 Documentation = "https://properdocs.org/"
 Source = "https://github.com/properdocs/properdocs"
 Issues = "https://github.com/properdocs/properdocs/issues"
-History = "https://properdocs.org/about/release-notes/"
+History = "https://github.com/properdocs/properdocs/releases"
 
 [project.scripts]
 properdocs = "properdocs.__main__:cli"
@@ -102,7 +86,10 @@ dependencies = [
 ]
 
 [tool.hatch.env]
-requires = ["hatch-mkdocs", "hatch-pip-compile"]
+requires = [
+    "hatch-mkdocs",
+    "hatch-pip-compile >=1.7.0",
+]
 
 [tool.hatch.envs.default.scripts]
 all = [
@@ -127,12 +114,8 @@ _coverage = [
 ]
 with-coverage = "test"
 [[tool.hatch.envs.test.matrix]]
-python = ["3.8", "3.9", "3.10", "3.11", "3.12", "pypy3"]
-type = ["default", "min-req"]
+python = ["3.9", "3.10", "3.11", "3.12", "3.13", "3.14"]
 [tool.hatch.envs.test.overrides]
-matrix.type.features = [
-    { value = "min-versions", if = ["min-req"] },
-]
 matrix.type.scripts = [
     { key = "with-coverage", value = "_coverage", if = ["default"] },
 ]
@@ -144,7 +127,7 @@ detached = false
 [tool.hatch.envs.integration.scripts]
 test = "python -m properdocs.tests.integration"
 [[tool.hatch.envs.integration.matrix]]
-python = ["3.8", "3.9", "3.10", "3.11", "3.12", "pypy3"]
+python = ["3.9", "3.10", "3.11", "3.12", "3.13", "3.14"]
 type = ["default", "no-babel"]
 [tool.hatch.envs.integration.overrides]
 matrix.type.features = [
@@ -162,34 +145,21 @@ dependencies = [
     "typing-extensions",
 ]
 [tool.hatch.envs.types.scripts]
-check = "mypy properdocs"
+check = "mypy {args} properdocs"
 
 [tool.hatch.envs.style]
 type = "pip-compile"
 detached = true
 dependencies = [
-    "black",
-    "isort",
     "ruff",
 ]
 [tool.hatch.envs.style.scripts]
-check = [
-    "isort --check-only --diff properdocs docs",
-    "black -q --check --diff properdocs docs",
-    "lint",
-]
-lint = [
-    "ruff check properdocs docs {args}"
-]
+check = "ruff check properdocs {args}"
+format = "ruff format -q properdocs"
 fix = [
-    "lint --fix",
+    "check --fix --unsafe-fixes",
     "format",
 ]
-format = [
-    "isort -q properdocs docs",
-    "black -q properdocs docs",
-]
-
 [tool.hatch.envs.lint]
 detached = true
 dependencies = [
@@ -207,33 +177,45 @@ path = "mkdocs.yml"
 type = "pip-compile"
 detached = false
 
-[tool.black]
+[tool.ruff]
 line-length = 100
-skip-string-normalization = true
-
-[tool.isort]
-profile = "black"
-line_length = 100
+[tool.ruff.format]
+quote-style = "preserve"
 
-[tool.ruff]
+[tool.ruff.lint]
+preview = true
 select = [
-    "F", "W", "E", "UP", "YTT", "C4", "DTZ", "FA", "ISC", "PIE", "T20", "RSE", "TCH",
-    "B002", "B003", "B005", "B007", "B009", "B012", "B013", "B014", "B015", "B018", "B020", "B021", "B023", "B026", "B033", "B034", "B905",
+    "F", "E", "W", "I", "UP", "YTT", "ASYNC", "C4", "DTZ", "T10", "FA", "ISC", "PIE", "T20", "RSE",
+    "N803", "N804", "N805", "N806", "N807", "N815", "N999",
+    "S201", "S202", "S303", "S304", "S305", "S306", "S602", "S604", "S605", "S612",
+    "B002", "B003", "B004", "B005", "B008", "B009", "B010", "B011", "B012", "B013", "B014", "B015", "B016", "B017", "B018", "B020", "B021", "B022", "B023", "B025", "B026", "B029", "B030", "B031", "B032", "B033", "B034", "B035", "B039", "B909",
     "COM818",
     "D200", "D201", "D202", "D204", "D207", "D208", "D209", "D210", "D211", "D213", "D214", "D300", "D301", "D400", "D402", "D403", "D405", "D412", "D414", "D415", "D416", "D417", "D419",
-    "PERF101",
-    "PGH002", "PGH004", "PGH005",
+    "LOG001", "LOG007", "LOG009", "LOG015",
+    "G001", "G002", "G010", "G101", "G201", "G202",
+    "PYI001", "PYI002", "PYI003", "PYI004", "PYI005", "PYI006", "PYI007", "PYI008", "PYI009", "PYI010", "PYI011", "PYI012", "PYI013", "PYI014", "PYI015", "PYI016", "PYI017", "PYI018", "PYI020", "PYI021", "PYI024", "PYI025", "PYI026", "PYI029", "PYI030", "PYI032", "PYI033", "PYI035", "PYI036", "PYI041", "PYI042", "PYI043", "PYI044", "PYI045", "PYI046", "PYI047", "PYI048", "PYI049", "PYI050", "PYI051", "PYI052", "PYI053", "PYI054", "PYI055", "PYI056", "PYI057", "PYI058", "PYI061", "PYI062", "PYI063", "PYI064", "PYI066",
+    "Q004",
+    "SIM101", "SIM103", "SIM107", "SIM109", "SIM113", "SIM118", "SIM201", "SIM202", "SIM208", "SIM210", "SIM211", "SIM212", "SIM220", "SIM221", "SIM222", "SIM223", "SIM300", "SIM401", "SIM905", "SIM910", "SIM911",
+    "TC001", "TC002", "TC003", "TC004", "TC005", "TC006", "TC007", "TC008", "TC010",
+    "PTH201",
+    "TD004", "TD005", "TD006", "TD007",
+    "PGH004", "PGH005",
+    "PLC0105", "PLC0131", "PLC0132", "PLC0205", "PLC0208", "PLC0414", "PLC2401", "PLC2403", "PLC2701", "PLC2801", "PLC3002",
+    "PLR0124", "PLR0133", "PLR0202", "PLR0203", "PLR0206", "PLR0402", "PLR1716", "PLR1722", "PLR1733", "PLR1736", "PLR2044",
+    "TRY201", "TRY203", "TRY401",
     "FLY002",
-    "PLC", "PLE", "PLR0124", "PLR0133", "PLR0206", "PLR0402", "PLR1701", "PLR1722", "PLW0120", "PLW0127", "PLW0129", "PLW0131", "PLW0406", "PLW0602", "PLW0603", "PLW0711",
-    "RUF001", "RUF005", "RUF007", "RUF010", "RUF013", "RUF100", "RUF200",
-    "SIM101", "SIM107", "SIM201", "SIM202", "SIM208", "SIM210", "SIM211", "SIM300", "SIM401", "SIM910",
-]
-ignore = ["E501", "E731"]
-
-[tool.ruff.flake8-comprehensions]
+    "PERF101", "PERF102", "PERF402", "PERF403",
+    "FURB105", "FURB110", "FURB116", "FURB129", "FURB131", "FURB132", "FURB136", "FURB142", "FURB145", "FURB148", "FURB154", "FURB156", "FURB157", "FURB161", "FURB163", "FURB164", "FURB166", "FURB168", "FURB169", "FURB171", "FURB177", "FURB181", "FURB188", "FURB192",
+    "RUF001", "RUF002", "RUF003", "RUF005", "RUF006", "RUF007", "RUF008", "RUF009", "RUF010", "RUF013", "RUF016", "RUF017", "RUF018", "RUF019", "RUF020", "RUF021", "RUF023", "RUF024", "RUF026", "RUF028", "RUF029", "RUF030", "RUF031", "RUF032", "RUF033", "RUF034", "RUF036", "RUF037", "RUF038", "RUF039", "RUF040", "RUF041", "RUF046", "RUF047", "RUF048", "RUF049", "RUF051", "RUF055", "RUF056", "RUF057", "RUF058", "RUF100", "RUF101", "RUF200",
+]
+ignore = ["E501", "E731", "UP038", "UP045", "UP007", "F841"]
+[tool.ruff.lint.per-file-ignores]
+"properdocs/tests/**" = ["PLC2701", "PLR6301"]
+[tool.ruff.lint.flake8-comprehensions]
 allow-dict-calls-with-keyword-arguments = true
+[tool.ruff.lint.flake8-type-checking]
+exempt-modules = ["typing", "collections.abc"]
 
 [tool.mypy]
 warn_unreachable = true
-no_implicit_optional = true
-show_error_codes = true
+allow_redefinition = true
diff --git a/requirements/requirements-docs.txt b/requirements/requirements-docs.txt
index f9cd05d6..4817df17 100644
--- a/requirements/requirements-docs.txt
+++ b/requirements/requirements-docs.txt
@@ -71,7 +71,7 @@ mergedeep==1.3.4
     #   hatch.envs.docs
     #   properdocs
     #   mkdocs-get-deps
-properdocs==1.5.3
+#properdocs==1.5.3
     # via
     #   hatch.envs.docs
     #   mkdocs-autorefs
diff --git a/requirements/requirements-style.txt b/requirements/requirements-style.txt
index 596540f5..8d988031 100644
--- a/requirements/requirements-style.txt
+++ b/requirements/requirements-style.txt
@@ -1,24 +1,8 @@
 #
-# This file is autogenerated by hatch-pip-compile with Python 3.11
+# This file is autogenerated by hatch-pip-compile with Python 3.13
 #
-# - black
-# - isort
 # - ruff
 #
 
-black==23.12.1
-    # via hatch.envs.style
-click==8.1.7
-    # via black
-isort==5.13.2
-    # via hatch.envs.style
-mypy-extensions==1.0.0
-    # via black
-packaging==23.2
-    # via black
-pathspec==0.12.1
-    # via black
-platformdirs==4.1.0
-    # via black
-ruff==0.1.14
+ruff==0.9.6
     # via hatch.envs.style