diff --git a/.github/workflows/ci_tests.yml b/.github/workflows/all_core_tests.yml
similarity index 59%
rename from .github/workflows/ci_tests.yml
rename to .github/workflows/all_core_tests.yml
index d0593d4..a359c50 100644
--- a/.github/workflows/ci_tests.yml
+++ b/.github/workflows/all_core_tests.yml
@@ -1,21 +1,27 @@
-name: ci-tests
+name: 'PR: Run core tests'
 
-on: push
+on: pull_request
 
 jobs:
   all_checks:
-    name: Run all tests, lints, etc. (Python 3.11)
+    name: plus lints, etc. on Python 3.13
     runs-on: ubuntu-latest
-    if: "!contains(github.event.head_commit.message, '[skip ci]')"
+    if: ${{ !contains(toJson(github.event), '[skip ci]') }}
 
     steps:
     - name: Check out repo
-      uses: actions/checkout@v2
+      uses: actions/checkout@v6
+      with:
+        persist-credentials: false
 
     - name: Install Python
-      uses: actions/setup-python@v2
+      uses: actions/setup-python@v6
       with:
-        python-version: '3.11'
+        python-version: '3.13'
+        cache: 'pip'
+        cache-dependency-path: |
+          requirements-ci.txt
+          requirements-flake8.txt
 
     - name: Update pip & setuptools
       run: python -m pip install -U pip setuptools
@@ -34,26 +40,27 @@ jobs:
     - name: Lint code
       run: tox -e flake8
 
-    - name: Transmit to Codecov
-      run: codecov
-
 
   just_tests:
-    name: Run only the test suite
+    name: for Python ${{ matrix.python }}
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python: ['3.8', '3.9', '3.10', '3.11', '3.12']
-    if: "!contains(github.event.head_commit.message, '[skip ci]')"
+        python: ['3.10', '3.11', '3.12', '3.14']
+    if: '!contains(github.event.head_commit.message, ''[skip ci]'')'
 
     steps:
     - name: Check out repo
-      uses: actions/checkout@v2
+      uses: actions/checkout@v6
+      with:
+        persist-credentials: false
 
     - name: Install Python
-      uses: actions/setup-python@v2
+      uses: actions/setup-python@v6
       with:
         python-version: ${{ matrix.python }}
+        cache: 'pip'
+        cache-dependency-path: requirements-ci.txt
 
     - name: Update pip & setuptools
       run: python -m pip install -U pip setuptools
diff --git a/.github/workflows/release_platform_tests.yml b/.github/workflows/release_platform_tests.yml
new file mode 100644
index 0000000..3fbb638
--- /dev/null
+++ b/.github/workflows/release_platform_tests.yml
@@ -0,0 +1,51 @@
+name: 'RELEASE: Run cross-platform tests'
+
+on:
+  pull_request:
+    types:
+      - opened
+      - reopened
+      - synchronize
+      - ready_for_review
+    branches:
+      - stable
+
+jobs:
+  just_tests:
+    name: ${{ matrix.os }} python ${{ matrix.py }}
+    runs-on: ${{ matrix.os }}
+    concurrency:
+      group: ${{ github.workflow }}-${{ matrix.os }}-${{ matrix.py }}-${{ github.ref }}
+      cancel-in-progress: true
+    if: ${{ !github.event.pull_request.draft && !contains(toJson(github.event), '[skip ci]') }}
+    strategy:
+      matrix:
+        os: ['windows-latest', 'macos-latest']
+        py: ['3.10', '3.11', '3.12', '3.13']
+
+    steps:
+    - name: Check out repo
+      uses: actions/checkout@v6
+      with:
+        persist-credentials: false
+
+    - name: Install Python
+      uses: actions/setup-python@v6
+      with:
+        python-version: ${{ matrix.py }}
+        cache: 'pip'
+        cache-dependency-path: requirements-ci.txt
+
+    - name: Update pip & setuptools
+      run: python -m pip install -U pip setuptools
+
+    - name: Install & report CI dependencies
+      run: |
+        python -m pip install -U --force-reinstall -r requirements-ci.txt
+        python --version
+        pip list
+
+    - name: Run tests
+      run: |
+        pytest --cov
+        tox -e sdist_install
diff --git a/.github/workflows/release_sdist_test.yml b/.github/workflows/release_sdist_test.yml
new file mode 100644
index 0000000..df32bac
--- /dev/null
+++ b/.github/workflows/release_sdist_test.yml
@@ -0,0 +1,76 @@
+name: 'RELEASE: Check sdist'
+
+on:
+  pull_request:
+    types:
+      - opened
+      - reopened
+      - synchronize
+      - ready_for_review
+    branches:
+      - stable
+
+jobs:
+  sdist_build_and_check:
+    name: builds & is testable
+    runs-on: 'ubuntu-latest'
+    concurrency:
+      group: ${{ github.workflow }}-${{ github.ref }}
+      cancel-in-progress: true
+    if: ${{ !github.event.pull_request.draft && !contains(toJson(github.event), '[skip ci]')}}
+
+    steps:
+    - name: Check out repo
+      uses: actions/checkout@v6
+      with:
+        persist-credentials: false
+
+    - name: Install Python
+      uses: actions/setup-python@v6
+      with:
+        python-version: '3.14'
+        cache: 'pip'
+        cache-dependency-path: |
+          requirements-dev.txt
+          requirements-flake8.txt
+
+    - name: Install 'build' package
+      run: python -m pip install build
+
+    - name: Build sdist
+      run: |
+        python -m build -s
+        ls -lah dist
+
+    - name: Create sandbox
+      run: mkdir sandbox
+
+    - name: Unpack sdist in sandbox
+      run: |
+        cp dist/*.gz sandbox/
+        cd sandbox
+        tar xvf *.gz
+
+    - name: Create venv
+      run: |
+        cd sandbox
+        python -m venv env
+
+    # Only the dir of the unpacked sdist will have a digit in its name
+    - name: Store sdist unpack path
+      run: echo "UNPACK_PATH=$( find sandbox -maxdepth 1 -type d -regex 'sandbox/.+[0-9].+' )" >> $GITHUB_ENV
+
+    - name: Report sdist unpack path
+      run: echo $UNPACK_PATH
+
+    - name: Install dev req'ts to venv
+      run: |
+        source sandbox/env/bin/activate
+        cd "$UNPACK_PATH"
+        python -m pip install -r requirements-dev.txt
+
+    - name: Run test suite in sandbox
+      run: |
+        source sandbox/env/bin/activate
+        cd "$UNPACK_PATH"
+        pytest
diff --git a/.github/workflows/release_testdir_coverage.yml b/.github/workflows/release_testdir_coverage.yml
new file mode 100644
index 0000000..03e3cb3
--- /dev/null
+++ b/.github/workflows/release_testdir_coverage.yml
@@ -0,0 +1,40 @@
+name: 'RELEASE: Ensure all tests ran'
+
+on:
+  pull_request:
+    types:
+      - opened
+      - reopened
+      - synchronize
+      - ready_for_review
+    branches:
+      - stable
+
+jobs:
+  testdir_coverage:
+    name: via coverage check
+    runs-on: 'ubuntu-latest'
+    if: ${{ !github.event.pull_request.draft && !contains(toJson(github.event), '[skip ci]')}}
+
+    steps:
+    - name: Check out repo
+      uses: actions/checkout@v6
+      with:
+        persist-credentials: false
+
+    - name: Install Python
+      uses: actions/setup-python@v6
+      with:
+        python-version: '3.14'
+        cache: 'pip'
+        cache-dependency-path: |
+          requirements-ci.txt
+
+    - name: Install CI requirements
+      run: pip install -r requirements-ci.txt
+
+    - name: Run pytest with coverage
+      run: pytest --cov
+
+    - name: Check 100% test execution
+      run: coverage report --include="tests/*" --fail-under=100
diff --git a/AUTHORS.md b/AUTHORS.md
index 24aebe9..96fd011 100644
--- a/AUTHORS.md
+++ b/AUTHORS.md
@@ -2,7 +2,7 @@ Credits
 =======
 
 `flake8-absolute-import` is authored and maintained by Brian Skinn
-([Blog](https://bskinn.github.io)) ([Twitter](https://twitter.com/btskinn)). The
+([Blog](https://bskinn.github.io)) ([Mastodon](https://fosstodon.org/@btskinn)). The
 skeleton of the AST-based implementation used for this plugin was shamelessly
 swiped from [`flake8-2020`](https://github.com/asottile/flake8-2020) by
 [Anthony Sottile](https://github.com/asottile).
diff --git a/CHANGELOG.md b/CHANGELOG.md
index ed90d11..5788c05 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,8 +3,80 @@
 All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
-and this project strives to adhere (mostly) to
-[Semantic Versioning](http://semver.org/spec/v2.0.0.html).
+and this project follows an extension of [Semantic
+Versioning](http://semver.org/spec/v2.0.0.html), adding a fourth `ADMIN` version
+segment.
+
+The plugin interface changes implied by bumps in these SemVer versions are
+specific to the error codes emitted by the plugin as part of flake8 execution:
+
+- **Major**
+  - Any addition or removal of an error code emitted by the plugin.
+  - Any change to the default behavior of the plugin with respect to an existing
+    error code.
+- **Minor**
+  - Addition of new, configurable behavior of the plugin related to an existing
+    error code, which is not expected to alter the error code emitting behavior
+    of any existing user configurations.
+- **Patch**
+  - Bugfixes to align the plugin's actual behavior with its stated behavior with
+    regard to error codes emitted.
+- **Admin**
+  - Releases with changes that are expected to have no effect on plugin
+    behavior.
+
+
+### [1.0.0.3] - 2025-11-27
+
+This release contains significant changes, but none that should alter the
+behavior of the plugin. Thus, it is being considered an administrative release
+despite its scale.
+
+#### Dependencies
+
+- Add formal support for Python 3.13 and 3.14.
+
+- Drop formal support for Python 3.8 and 3.9.
+
+- Increase the minimum permitted Python version to install the package to Python
+  3.10.
+
+#### Internal
+
+- Add types to the project code.
+
+#### Administrative
+
+- Upgrade `checkout` and `setup-python` actions.
+
+- Convert Azure Pipelines jobs to GitHub Actions and remove Azure config.
+  - The cross-platform auth/auth required to keep Pipelines working just wasn't
+    worth the effort to put in place.
+  - The cross-platform tests, sdist-install check, and test-dir coverage check
+    now all run only on PRs to `stable`.
+    - Credentials persistence was disabled for all.
+    - All were implemented with pip caching.
+
+- Convert core tests workflow to run on PR, not push, and modernize.
+  - Cache pip.
+  - Disable credentials persistence.
+  - Advance Python versions.
+
+- Remove CodeCov from workflows and requirements.
+  - The project/team is far too small for it to be valuable.
+
+- Update copyright end years.
+
+- Convert `README` to Markdown.
+
+- Modernize `pyproject.toml` and `setuptools` config.
+
+- Add multiple `tox` envs:
+  - `black`
+  - `mypy`
+  - `isort`
+  - `check` (rollup of `isort`, `black`, `flake8`, `mypy`)
+  - `build`
 
 
 ### [1.0.0.2] - 2023-10-08
diff --git a/LICENSE.txt b/LICENSE.txt
index 3742dc3..12728c3 100644
--- a/LICENSE.txt
+++ b/LICENSE.txt
@@ -1,6 +1,6 @@
 The MIT License (MIT)
 
-Copyright (c) 2019-2023 Brian Skinn
+Copyright (c) 2019-2025 Brian Skinn
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
diff --git a/MANIFEST.in b/MANIFEST.in
index 8606d0b..0673235 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -1,2 +1,3 @@
-include AUTHORS.md LICENSE.txt README.rst CHANGELOG.md pyproject.toml
+include AUTHORS.md LICENSE.txt README.md CHANGELOG.md pyproject.toml
 include requirements-dev.txt requirements-flake8.txt tox.ini
+include src/flake8_absolute_import/py.typed
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..51c5a69
--- /dev/null
+++ b/README.md
@@ -0,0 +1,77 @@
+## flake8-absolute-import: A flake8 plugin to require absolute imports
+
+#### Current Development Version
+
+[![GitHub Workflow Status][workflow badge]][workflow link target]
+
+#### Most Recent Stable Release
+
+[![PyPI Version][pypi badge]][pypi link target]
+![Python Versions][python versions badge]
+
+#### Info
+
+[![MIT License][license badge]][license link target]
+[![black formatted][black badge]][black link target]
+[![PePY stats][pepy badge]][pepy link target]
+
+----
+
+### Don't like relative imports?
+
+#### Lint 'em out!
+
+`flake8-absolute-import` uses a direct check of the AST for each
+`from x import y` statement to flag relative imports.
+Specifically, it checks for a nonzero _level_ attribute on each
+[`ImportFrom`] node.
+
+Relative imports raise the `ABS101` error code:
+
+```py
+    from foo import bar   # OK
+    from .foo import bar  # ABS101
+```
+
+----
+
+Available on [PyPI][pypi link target] (`pip install flake8-absolute-import`).
+`flake8` should automatically detect and load the plugin. `flake8`>=5.0 is
+required.
+
+Source on [GitHub][gh repo]. Bug reports and feature requests are welcomed at
+the [Issues][gh issues] page there.
+
+Copyright (c) Brian Skinn 2019-2025
+
+The `flake8-absolute-import` documentation (currently docstrings and README) is
+licensed under a [Creative Commons Attribution 4.0 International License][cc-by]
+(CC-BY). The `flake8-absolute-import` codebase is released under the [MIT
+License]. See [`LICENSE.txt`] for full license terms.
+
+[`ImportFrom`]: https://docs.python.org/3/library/ast.html#ast.ImportFrom
+[`LICENSE.txt`]: https://github.com/bskinn/flake8-absolute-import/blob/main/LICENSE.txt
+
+[black badge]: https://img.shields.io/badge/code%20style-black-000000.svg
+[black link target]: https://github.com/psf/black
+
+[cc-by]: http://creativecommons.org/licenses/by/4.0/
+
+[gh issues]: https://github.com/bskinn/flake8-absolute-import/issues
+[gh repo]: https://github.com/bskinn/flake8-absolute-import
+
+[license badge]: https://img.shields.io/github/license/mashape/apistatus.svg
+[license link target]: https://github.com/bskinn/flake8-absolute-import/blob/stable/LICENSE.txt
+
+[MIT License]: https://opensource.org/licenses/MIT
+
+[pepy badge]: https://pepy.tech/badge/flake8-absolute-import/month
+[pepy link target]: https://pepy.tech/projects/flake8-absolute-import?timeRange=threeMonths&category=version&includeCIDownloads=true&granularity=daily&viewType=line&versions=1.0.0.3%2C1.0.0.2%2C1.0.0.1%2C1.0
+
+[pypi badge]: https://img.shields.io/pypi/v/flake8-absolute-import.svg?logo=pypi
+[pypi link target]: https://pypi.org/project/flake8-absolute-import
+
+[python versions badge]: https://img.shields.io/pypi/pyversions/flake8-absolute-import.svg?logo=python
+
+[workflow badge]: https://img.shields.io/github/actions/workflow/status/bskinn/flake8-absolute-import/all_core_tests.yml?branch=main&logo=github
+[workflow link target]: https://github.com/bskinn/flake8-absolute-import/actions
diff --git a/README.rst b/README.rst
deleted file mode 100644
index 7044895..0000000
--- a/README.rst
+++ /dev/null
@@ -1,72 +0,0 @@
-flake8-absolute-import
-======================
-
-*flake8 plugin to require absolute imports*
-
-**Current Development Version:**
-
-.. image:: https://img.shields.io/github/actions/workflow/status/bskinn/flake8-absolute-import/ci_tests.yml?branch=main&logo=github
-    :alt: GitHub Workflow Status
-    :target: https://github.com/bskinn/flake8-absolute-import/actions
-
-.. image:: https://codecov.io/gh/bskinn/flake8-absolute-import/branch/main/graph/badge.svg
-    :target: https://codecov.io/gh/bskinn/flake8-absolute-import
-
-**Most Recent Stable Release:**
-
-.. image:: https://img.shields.io/pypi/v/flake8-absolute-import.svg?logo=pypi
-    :target: https://pypi.org/project/flake8-absolute-import
-
-.. image:: https://img.shields.io/pypi/pyversions/flake8-absolute-import.svg?logo=python
-
-**Info:**
-
-.. image:: https://img.shields.io/github/license/mashape/apistatus.svg
-    :target: https://github.com/bskinn/flake8-absolute-import/blob/stable/LICENSE.txt
-
-.. image:: https://img.shields.io/badge/code%20style-black-000000.svg
-    :target: https://github.com/psf/black
-
-.. image:: https://pepy.tech/badge/flake8-absolute-import/month
-    :target: https://pepy.tech/project/flake8-absolute-import
-
-----
-
-*Don't like relative imports?*
-
-Lint 'em out!
-
-``flake8-absolute-import`` uses a direct check of the AST for each
-``from x import y`` statement to flag relative imports.
-Specifically, it checks for a nonzero *level* attribute on each
-|ImportFrom|_ node.
-
-Relative imports raise the ``ABS101`` error code:
-
-.. code:: python
-
-    from foo import bar   # OK
-    from .foo import bar  # ABS101
-
-----
-
-Available on `PyPI <https://pypi.python.org/pypi/flake8-absolute-import>`__
-(``pip install flake8-absolute-import``).  ``flake8`` should automatically
-detect and load the plugin. ``flake8``>=5.0 is required.
-
-Source on `GitHub <https://github.com/bskinn/flake8-absolute-import>`__.  Bug reports
-and feature requests are welcomed at the
-`Issues <https://github.com/bskinn/flake8-absolute-import/issues>`__ page there.
-
-Copyright (c) Brian Skinn 2019-2023
-
-The ``flake8-absolute-import`` documentation (including docstrings and README)
-is licensed under a
-`Creative Commons Attribution 4.0 International License <http://creativecommons.org/licenses/by/4.0/>`__
-(CC-BY). The ``flake8-absolute-import`` codebase is released under the
-`MIT License <https://opensource.org/licenses/MIT>`__. See
-`LICENSE.txt <https://github.com/bskinn/flake8-absolute-import/blob/main/LICENSE.txt>`__ for
-full license terms.
-
-.. _ImportFrom: https://greentreesnakes.readthedocs.io/en/latest/nodes.html#ImportFrom
-.. |ImportFrom| replace:: ``ImportFrom``
diff --git a/azure-coretest.yml b/azure-coretest.yml
deleted file mode 100644
index 9d89f6a..0000000
--- a/azure-coretest.yml
+++ /dev/null
@@ -1,33 +0,0 @@
-parameters:
-  pythons: []
-  platforms: []
-
-jobs:
-- ${{ each python in parameters.pythons }}:
-  - ${{ each platform in parameters.platforms }}:
-    - job: ${{ coalesce(python.value.name, python.key) }}_${{ coalesce(platform, 'linux') }}
-      variables:
-        ${{ if eq(platform, 'linux') }}:
-          image: 'Ubuntu-latest'
-        ${{ if eq(platform, 'windows') }}:
-          image: 'windows-latest'
-        ${{ if eq(platform, 'macOs') }}:
-          image: 'macOS-latest'
-        ${{ if notIn(platform, 'macOs', 'linux', 'windows') }}:
-          image: 'Ubuntu-latest'
-
-      pool:
-        vmImage: $[ variables.image ]
-
-      steps:
-        - task: UsePythonVersion@0
-          inputs:
-            versionSpec: '${{ python.value.spec }}'
-            architecture: 'x64'
-          displayName: Use cached Python ${{ python.value.spec }} for tests.
-
-        - script: pip install -r requirements-ci.txt
-          displayName: Install CI requirements
-
-        - script: pytest
-          displayName: Run pytest (Python ${{ python.value.spec }})
diff --git a/azure-pipelines.yml b/azure-pipelines.yml
deleted file mode 100644
index 910ca23..0000000
--- a/azure-pipelines.yml
+++ /dev/null
@@ -1,58 +0,0 @@
-trigger:
-  - release-*
-
-pr:
-  branches:
-    include:
-    - main
-    - stable
-
-
-jobs:
-- template: azure-coretest.yml
-  parameters:
-    pythons:
-      py38:
-        spec: '3.8'
-      py39:
-        spec: '3.9'
-      py310:
-        spec: '3.10'
-      py311:
-        spec: '3.11'
-      py312:
-        spec: '3.12'
-    platforms: [linux, windows, macOs]
-
-- template: azure-sdisttest.yml
-
-- job: flake8
-  pool:
-    vmImage: 'Ubuntu-latest'
-  steps:
-    - task: UsePythonVersion@0
-      inputs:
-        versionSpec: '3.11'
-
-    - script: pip install -U tox
-      displayName: Install tox
-
-    - script: tox -e flake8
-      displayName: Lint the codebase
-
-- job: testdir_coverage
-  pool:
-    vmImage: 'Ubuntu-latest'
-  steps:
-    - task: UsePythonVersion@0
-      inputs:
-        versionSpec: '3.11'
-
-    - script: pip install -r requirements-ci.txt
-      displayName: Install CI requirements
-
-    - script: pytest --cov
-      displayName: Run pytest with coverage
-
-    - script: coverage report --include="tests/*" --fail-under=100
-      displayName: Check 100% test execution
diff --git a/azure-sdisttest.yml b/azure-sdisttest.yml
deleted file mode 100644
index 9f7e2a3..0000000
--- a/azure-sdisttest.yml
+++ /dev/null
@@ -1,74 +0,0 @@
-jobs:
-- job: testable_sdist
-  displayName: Ensure sdist is testable
-
-  variables:
-    pip_cache_dir: $(Pipeline.Workspace)/.pip
-
-  pool:
-    vmImage: 'Ubuntu-latest'
-
-  steps:
-  - task: UsePythonVersion@0
-    inputs:
-      versionSpec: '3.11'
-
-  - task: Cache@2
-    inputs:
-      key: 'pip | "$(Agent.OS)" | requirements-dev.txt | requirements-flake8.txt'
-      restoreKeys: |
-        pip | "$(Agent.OS)"
-      path: $(pip_cache_dir)
-    displayName: Cache pip
-
-  - script: python -m pip install build
-    displayName: Install 'build' package
-
-  - script: |
-      python -m build -s
-      ls -lah dist
-    displayName: Build sdist
-
-  - script: |
-      mkdir sandbox
-    displayName: Create sandbox
-
-  - script: |
-      cp dist/*.gz sandbox/
-      cd sandbox
-      tar xvf *.gz
-    displayName: Unpack sdist in sandbox
-
-  - script: |
-      cd sandbox
-      python -m venv env
-    displayName: Create venv
-
-  # Only the dir of the unpacked sdist will have a digit in its name
-  - script: |
-      cd sandbox
-      echo $( find . -maxdepth 1 -type d -regex "./.+[0-9].+" )
-    displayName: Check unpack dir name
-
-  - script: |
-      cd sandbox
-      source env/bin/activate
-      cd $( find . -maxdepth 1 -type d -regex "./.+[0-9].+" )
-      python -m pip install -r requirements-dev.txt
-    displayName: Install dev req'ts to venv
-
-  - script: |
-      cd sandbox
-      source env/bin/activate
-      cd $( find . -maxdepth 1 -type d -regex "./.+[0-9].+" )
-      cd doc
-      O=-Ean make html
-    displayName: Build docs in sandbox (skipped, no docs)
-    condition: false
-
-  - script: |
-      cd sandbox
-      source env/bin/activate
-      cd $( find . -maxdepth 1 -type d -regex "./.+[0-9].+" )
-      pytest
-    displayName: Run test suite in sandbox
diff --git a/pyproject.toml b/pyproject.toml
index cbc890c..3fe321e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,7 +1,7 @@
 [build-system]
 requires = [
     "wheel",
-    "setuptools>=61.2",
+    "setuptools>=77",
 ]
 build-backend = "setuptools.build_meta"
 
@@ -11,9 +11,11 @@ description = "flake8 plugin to require absolute imports"
 authors = [
     { name = "Brian Skinn", email = "brian.skinn@gmail.com" },
 ]
+license = "MIT"
+license-files = [
+    "LICENSE.txt",
+]
 classifiers = [
-    "License :: OSI Approved",
-    "License :: OSI Approved :: MIT License",
     "Natural Language :: English",
     "Framework :: Flake8",
     "Intended Audience :: Developers",
@@ -21,21 +23,23 @@ classifiers = [
     "Programming Language :: Python",
     "Programming Language :: Python :: 3",
     "Programming Language :: Python :: 3 :: Only",
-    "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 :: 3.13",
+    "Programming Language :: Python :: 3.14",
     "Topic :: Software Development :: Quality Assurance",
+    "Typing :: Typed",
     "Development Status :: 5 - Production/Stable",
 ]
 keywords = [
+    "flake8",
     "flake8-plugin",
     "linting",
     "absolute-imports",
     "relative-imports",
 ]
-requires-python = ">=3.6"
+requires-python = ">=3.10"
 dependencies = [
     "flake8>=5.0",
 ]
@@ -47,12 +51,8 @@ dynamic = [
 [project.urls]
 Homepage = "https://github.com/bskinn/flake8-absolute-import"
 Changelog = "https://github.com/bskinn/flake8-absolute-import/blob/main/CHANGELOG.md"
-Thank = "https://twitter.com/btskinn"
 Donate = "https://github.com/sponsors/bskinn"
 
-[project.license]
-text = "MIT License"
-
 [project.entry-points."flake8.extension"]
 ABS1 = "flake8_absolute_import:Plugin"
 
@@ -60,9 +60,6 @@ ABS1 = "flake8_absolute_import:Plugin"
 platforms = [
     "any",
 ]
-license-files = [
-    "LICENSE.txt",
-]
 include-package-data = false
 
 [tool.setuptools.dynamic]
@@ -81,17 +78,32 @@ namespaces = false
 line-length = 88
 include = '''
 (
-    ^tests/.*[.]py$
-  | ^src/flake8_absolute_import/.*[.]py$
-  | ^setup[.]py
-  | ^conftest[.]py
+    ^/tests/.*[.]py$
+  | ^/src/flake8_absolute_import/.*[.]py$
+  | ^/setup[.]py
+  | ^/conftest[.]py
 )
 '''
 exclude = '''
 (
     __pycache__
-  | ^[.]
-  | ^doc
-  | ^env
+  | ^/[.]
+  | ^/doc
+  | ^/env
 )
 '''
+
+[tool.mypy]
+mypy_path = "src"
+warn_return_any = true
+warn_unused_configs = true
+exclude = '''(?x)(
+  ^env/
+  )
+  '''
+
+[[tool.mypy.overrides]]
+module = [
+  "pytest",
+]
+ignore_missing_imports = true
diff --git a/requirements-ci.txt b/requirements-ci.txt
index d4e2d78..36b2a91 100644
--- a/requirements-ci.txt
+++ b/requirements-ci.txt
@@ -1,4 +1,3 @@
-codecov
 pytest>=4.4.0
 pytest-cov
 tox
diff --git a/requirements-dev.txt b/requirements-dev.txt
index b8537c1..d44b096 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -1,9 +1,8 @@
-build
 pytest>=4.4.0
 pytest-cov
 restview
 tox
+types-setuptools
 twine
 wget
--r requirements-flake8.txt
 -e .
diff --git a/setup.py b/setup.py
index 19adc57..e6f732a 100644
--- a/setup.py
+++ b/setup.py
@@ -1,21 +1,22 @@
 import re
 from pathlib import Path
 from setuptools import find_packages, setup
+from typing import Any, cast
 
 
-exec_ns = {}
+exec_ns: dict[str, Any] = {}
 exec(
     Path("src", "flake8_absolute_import", "version.py").read_text(encoding="utf-8"),
     exec_ns,
 )
-__version__ = exec_ns["__version__"]
+__version__ = cast(str, exec_ns["__version__"])
 
 NAME = "flake8-absolute-import"
 version_override = None
 
 
 def readme():
-    content = Path("README.rst").read_text()
+    content = Path("README.md").read_text(encoding="utf-8")
 
     new_ver = version_override if version_override else __version__
 
@@ -39,5 +40,5 @@ def content_update(content, pattern, sub):
 
 setup(
     long_description=readme(),
-    long_description_content_type="text/x-rst",
+    long_description_content_type="text/markdown",
 )
diff --git a/src/flake8_absolute_import/__init__.py b/src/flake8_absolute_import/__init__.py
index 5fe1ff3..7705159 100644
--- a/src/flake8_absolute_import/__init__.py
+++ b/src/flake8_absolute_import/__init__.py
@@ -9,7 +9,7 @@
     6 Sep 2019
 
 **Copyright**
-    \(c) Brian Skinn 2019-2023
+    \(c) Brian Skinn 2019-2025
 
 **Source Repository**
     http://github.com/bskinn/flake8-absolute-import
diff --git a/src/flake8_absolute_import/core.py b/src/flake8_absolute_import/core.py
index 63ba5a2..3fb5567 100644
--- a/src/flake8_absolute_import/core.py
+++ b/src/flake8_absolute_import/core.py
@@ -9,7 +9,7 @@
     6 Sep 2019
 
 **Copyright**
-    \(c) Brian Skinn 2019-2023
+    \(c) Brian Skinn 2019-2025
 
 **Source Repository**
     http://github.com/bskinn/flake8-absolute-import
@@ -22,21 +22,21 @@
 """
 
 import ast
+from typing import Generator
 
 from flake8_absolute_import.version import __version__
 
-
-ABS101 = "ABS101 Relative import found"
+ABS101: str = "ABS101 Relative import found"
 
 
 class Visitor(ast.NodeVisitor):
     """NodeVisitor to report relative imports."""
 
-    def __init__(self):
+    def __init__(self) -> None:
         """Create a Visitor with empty errors list."""
-        self.errors = []
+        self.errors: list[tuple[int, int, str]] = []
 
-    def visit_ImportFrom(self, node):  # noqa: N802
+    def visit_ImportFrom(self, node) -> None:  # noqa: N802
         """Implement check for relative import."""
         if node.level > 0:
             self.errors.append((node.lineno, node.col_offset, ABS101))
@@ -47,14 +47,14 @@ def visit_ImportFrom(self, node):  # noqa: N802
 class Plugin:
     """Core plugin class for flake8-absolute-import."""
 
-    name = "flake8-absolute-import"
+    name: str = "flake8-absolute-import"
     version = __version__
 
-    def __init__(self, tree):
+    def __init__(self, tree: ast.Module) -> None:
         """Create plugin instance from the provided AST."""
         self._tree = tree
 
-    def run(self):
+    def run(self) -> Generator[tuple[int, int, str, type], None, None]:
         """Traverse the AST and collect the errors."""
         visitor = Visitor()
         visitor.visit(self._tree)
diff --git a/src/flake8_absolute_import/py.typed b/src/flake8_absolute_import/py.typed
new file mode 100644
index 0000000..8b13789
--- /dev/null
+++ b/src/flake8_absolute_import/py.typed
@@ -0,0 +1 @@
+
diff --git a/src/flake8_absolute_import/version.py b/src/flake8_absolute_import/version.py
index e7b00e5..653d993 100644
--- a/src/flake8_absolute_import/version.py
+++ b/src/flake8_absolute_import/version.py
@@ -9,7 +9,7 @@
     6 Sep 2019
 
 **Copyright**
-    \(c) Brian Skinn 2019-2023
+    \(c) Brian Skinn 2019-2025
 
 **Source Repository**
     http://github.com/bskinn/flake8-absolute-import
@@ -21,4 +21,4 @@
 
 """
 
-__version__ = "1.0.0.3.dev0"
+__version__: str = "1.0.0.4.dev0"
diff --git a/tests/test_plugin.py b/tests/test_plugin.py
index ed24f3c..8da4732 100644
--- a/tests/test_plugin.py
+++ b/tests/test_plugin.py
@@ -9,7 +9,7 @@
     6 Sep 2019
 
 **Copyright**
-    \(c) Brian Skinn 2019-2023
+    \(c) Brian Skinn 2019-2025
 
 **Source Repository**
     http://github.com/bskinn/flake8-absolute-import
diff --git a/tox.ini b/tox.ini
index 1334960..304fd4f 100644
--- a/tox.ini
+++ b/tox.ini
@@ -2,8 +2,8 @@
 minversion=2.0
 isolated_build=True
 envlist=
-    py3{7,8,9,10,11,12}-f8_{min,latest}
-    py3{11,12}-f8_{5_x}
+    py3{10,11,12,13,14}-f8_{min,latest}
+    py3{13,14}-f8_{5_x,6_x}
     sdist_install
     flake8
 
@@ -17,16 +17,24 @@ deps=
     f8_latest:     flake8
     f8_min:        flake8==5.0
     f8_5_x:        flake8~=5.0
+    f8_6_x:        flake8~=6.0
+
+[testenv:win32]
+platform=win32
+basepython=
+    py313: python3.13
+    py312: python3.12
+    py311: python3.11
+    py310: python3.10
 
 [testenv:linux]
 platform=linux
 basepython=
+    py314: python3.14
+    py313: python3.13
     py312: python3.12
     py311: python3.11
     py310: python3.10
-    py39: python3.9
-    py38: python3.8
-    py37: python3.7
 
 [testenv:sdist_install]
 commands=
@@ -40,6 +48,52 @@ commands=
     flake8 --version
     flake8 tests src
 
+[testenv:black]
+skip_install=True
+deps=black
+commands=
+    black {posargs} .
+
+[testenv:mypy]
+description=Type-check with mypy
+skip_install=True
+deps=mypy
+commands=
+    mypy --version
+    mypy {posargs} src tests
+
+[testenv:isort]
+description=Sort, group, and coalesce imports
+skip_install=True
+deps=isort
+commands=
+    isort --version
+    isort {posargs} src tests
+
+[testenv:check]
+description=Run isort, black, flake8, and mypy
+skip_install=True
+deps=
+    isort
+    black
+    -r requirements-flake8.txt
+    mypy
+commands=
+    isort --version
+    isort {posargs} src tests
+    black {posargs} .
+    flake8 --version
+    flake8 tests src
+    mypy --version
+    mypy {posargs} src tests
+
+[testenv:build]
+description=Build project to wheel and sdist
+skip_install=True
+deps=build
+commands=
+    python -m build
+
 [pytest]
 addopts = -v -rsX -W error::Warning --strict-markers
 xfail_strict = True