diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index 88c0c7c..9ec1f20 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -4,6 +4,7 @@ on: [push, pull_request, workflow_dispatch]
 
 env:
   FORCE_COLOR: 1
+  PIP_DISABLE_PIP_VERSION_CHECK: 1
 
 permissions:
   contents: read
@@ -17,4 +18,20 @@ jobs:
       - uses: actions/setup-python@v5
         with:
           python-version: "3.x"
+          cache: pip
       - uses: pre-commit/action@v3.0.1
+
+  mypy:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: "3.x"
+          cache: pip
+      - name: Install dependencies
+        run: |
+          python3 -m pip install -U tox
+      - name: Mypy
+        run: tox -e mypy
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index fb15489..eded593 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -11,17 +11,12 @@ env:
 
 jobs:
   test:
-    runs-on: "${{ matrix.os }}-${{ matrix.os-version || 'latest' }}"
+    runs-on: "${{ matrix.os }}-latest"
     strategy:
       fail-fast: false
       matrix:
         python-version: ["pypy3.10", "3.8", "3.9", "3.10", "3.11", "3.12", "3.13"]
         os: [Windows, macOS, Ubuntu]
-        # Python 3.8 and 3.9 are on macos-13 but not macos-latest (macos-14-arm64)
-        # https://github.com/actions/setup-python/issues/696#issuecomment-1637587760
-        include:
-          - { python-version: "3.8", os: "macOS", os-version: "13" }
-          - { python-version: "3.9", os: "macOS", os-version: "13" }
 
     steps:
       - uses: actions/checkout@v4
diff --git a/.gitignore b/.gitignore
index 2dc53ca..efe4d34 100644
--- a/.gitignore
+++ b/.gitignore
@@ -158,3 +158,6 @@ cython_debug/
 #  and can be added to the global gitignore or merged into this file.  For a more nuclear
 #  option (not recommended) you can uncomment the following to ignore the entire idea folder.
 .idea/
+
+# hatch-vcs
+src/*/_version.py
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 2e564f7..0ff6293 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -35,14 +35,6 @@ repos:
     hooks:
       - id: actionlint
 
-  - repo: https://github.com/pre-commit/mirrors-mypy
-    rev: v1.11.2
-    hooks:
-      - id: mypy
-        args: [--strict, --pretty, --show-error-codes]
-        additional_dependencies:
-          [platformdirs, pytest, python-slugify, rapidfuzz, types-freezegun, urllib3]
-
   - repo: https://github.com/tox-dev/pyproject-fmt
     rev: 2.2.1
     hooks:
diff --git a/pyproject.toml b/pyproject.toml
index 5cd99c2..604072e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -55,6 +55,9 @@ scripts.pep = "pepotron.cli:main"
 [tool.hatch]
 version.source = "vcs"
 
+[tool.hatch.build.hooks.vcs]
+version-file = "src/pepotron/_version.py"
+
 [tool.hatch.version.raw-options]
 local_scheme = "no-local-version"
 
diff --git a/src/pepotron/__init__.py b/src/pepotron/__init__.py
index a026683..21ddb29 100644
--- a/src/pepotron/__init__.py
+++ b/src/pepotron/__init__.py
@@ -4,14 +4,13 @@
 
 from __future__ import annotations
 
-import importlib.metadata
 import logging
 from pathlib import Path
 from typing import Any
 
-from . import _cache
+from . import _cache, _version
 
-__version__ = importlib.metadata.version(__name__)
+__version__ = _version.__version__
 
 BASE_URL = "https://peps.python.org"
 JSON_PATH = "/api/peps.json"
@@ -120,7 +119,7 @@ def pairwise(iterable):  # type: ignore[no-redef,no-untyped-def]
 
 
 def _get_github_prs() -> list[Any]:
-    from ghapi.all import GhApi  # type: ignore[import-not-found]
+    from ghapi.all import GhApi  # type: ignore[import-untyped]
 
     api = GhApi(owner="python", repo="peps", authenticate=False)
     return api.pulls.list(per_page=100)  # type: ignore[no-any-return]
diff --git a/tox.ini b/tox.ini
index 5334ace..1f22eb3 100644
--- a/tox.ini
+++ b/tox.ini
@@ -41,3 +41,15 @@ pass_env =
     PRE_COMMIT_COLOR
 commands =
     pre-commit run --all-files --show-diff-on-failure
+
+[testenv:mypy]
+deps =
+    mypy==1.11.2
+    platformdirs
+    pytest
+    python-slugify
+    rapidfuzz
+    types-freezegun
+    urllib3
+commands =
+    mypy --strict --pretty --show-error-codes . {posargs}