diff --git a/.cruft.json b/.cruft.json
new file mode 100644
index 0000000..77ac132
--- /dev/null
+++ b/.cruft.json
@@ -0,0 +1,17 @@
+{
+  "template": "http://github.com/allenporter/cookiecutter-python",
+  "commit": "09fcc9a7574cc92301d2b72ea2535fed208a2e39",
+  "checkout": null,
+  "context": {
+    "cookiecutter": {
+      "full_name": "Allen Porter",
+      "email": "allen.porter@gmail.com",
+      "github_username": "allenporter",
+      "project_name": "ical",
+      "description": "Python iCalendar implementation (rfc 2445)",
+      "version": "8.0.1",
+      "_template": "http://github.com/allenporter/cookiecutter-python"
+    }
+  },
+  "directory": null
+}
diff --git a/renovate.json5 b/.github/renovate.json5
similarity index 75%
rename from renovate.json5
rename to .github/renovate.json5
index d39a194..6a2cb3e 100644
--- a/renovate.json5
+++ b/.github/renovate.json5
@@ -12,7 +12,8 @@
       "matchUpdateTypes": ["minor", "patch"]
     }
   ],
-  "pre-commit": {
-    "enabled": true
-  }
+  "pip_requirements": {
+    "fileMatch": ["requirements_dev.txt"]
+  },
+  "pre-commit": {"enabled": true}
 }
diff --git a/.github/workflows/benchmark.yaml b/.github/workflows/benchmark.yaml
new file mode 100644
index 0000000..1bbffb3
--- /dev/null
+++ b/.github/workflows/benchmark.yaml
@@ -0,0 +1,34 @@
+---
+name: Python benchmarks
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version: ["3.11", "3.12"]
+
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v5
+        with:
+          python-version: ${{ matrix.python-version }}
+          cache: "pip"
+          cache-dependency-path: "**/requirements_dev.txt"
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          if [ -f requirements_dev.txt ]; then pip install -r requirements_dev.txt; fi
+      - name: Run benchmarks with pytest
+        run: |
+          pytest --benchmark-only
diff --git a/.github/workflows/cruft.yaml b/.github/workflows/cruft.yaml
new file mode 100644
index 0000000..75bc576
--- /dev/null
+++ b/.github/workflows/cruft.yaml
@@ -0,0 +1,79 @@
+---
+name: Update repository with Cruft
+permissions:
+  contents: write
+  pull-requests: write
+on:
+  schedule:
+    - cron: "0 0 * * *"
+
+env:
+  PYTHON_VERSION: 3.12
+
+jobs:
+  update:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: true
+      matrix:
+        include:
+          - add-paths: .
+            body: Use this to merge the changes to this repository.
+            branch: cruft/update
+            commit-message: "chore: accept new Cruft update"
+            title: New updates detected with Cruft
+          - add-paths: .cruft.json
+            body: Use this to reject the changes in this repository.
+            branch: cruft/reject
+            commit-message: "chore: reject new Cruft update"
+            title: Reject new updates detected with Cruft
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: ${{ env.PYTHON_VERSION }}
+
+      - name: Install Cruft
+        run: pip3 install cruft
+
+      - name: Check if update is available
+        continue-on-error: false
+        id: check
+        run: |
+          CHANGES=0
+          if [ -f .cruft.json ]; then
+            if ! cruft check; then
+              CHANGES=1
+            fi
+          else
+            echo "No .cruft.json file"
+          fi
+
+          echo "has_changes=$CHANGES" >> "$GITHUB_OUTPUT"
+
+      - name: Run update if available
+        if: steps.check.outputs.has_changes == '1'
+        run: |
+          git config --global user.email "allen.porter@gmail.com"
+          git config --global user.name "Allen Porter"
+
+          cruft update --skip-apply-ask --refresh-private-variables
+          git restore --staged .
+
+
+      - name: Create pull request
+        if: steps.check.outputs.has_changes == '1'
+        uses: peter-evans/create-pull-request@v6
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          add-paths: ${{ matrix.add-paths }}
+          commit-message: ${{ matrix.commit-message }}
+          branch: ${{ matrix.branch }}
+          delete-branch: true
+          branch-suffix: timestamp
+          title: ${{ matrix.title }}
+          body: |
+            This is an autogenerated PR. ${{ matrix.body }}
+
+            [Cruft](https://cruft.github.io/cruft/) has detected updates from the Cookiecutter repository.
diff --git a/.github/workflows/lint.yaml b/.github/workflows/lint.yaml
index 62a80e7..031141d 100644
--- a/.github/workflows/lint.yaml
+++ b/.github/workflows/lint.yaml
@@ -1,3 +1,4 @@
+---
 name: Lint
 
 on:
@@ -8,27 +9,40 @@ on:
     branches:
       - main
 
+env:
+  PYTHON_VERSION: 3.12
+
 jobs:
   build:
-
     runs-on: ubuntu-latest
     strategy:
       fail-fast: false
 
     steps:
-    - uses: actions/checkout@v4
-    - uses: chartboost/ruff-action@v1.0.0
-    - uses: codespell-project/actions-codespell@v2.0
-      with:
-        check_hidden: false
-    - name: Set up Python
-      uses: actions/setup-python@v5
-      with:
-        python-version: "3.12"
-    - name: Install dependencies
-      run: |
-        python -m pip install --upgrade pip
-        pip install -r requirements_dev.txt
-    - name: Static typing with mypy
-      run: |
-        mypy --install-types --non-interactive --no-warn-unused-ignores .
+      - uses: actions/checkout@v4
+      - uses: chartboost/ruff-action@v1.0.0
+      - uses: codespell-project/actions-codespell@v2.0
+        with:
+          check_hidden: false
+      - name: Run yamllint
+        uses: ibiqlik/action-yamllint@v3
+        with:
+          file_or_dir: "./"
+          config_file: "./.yaml-lint.yaml"
+          strict: true
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: ${{ env.PYTHON_VERSION }}
+          cache: "pip"
+          cache-dependency-path: "**/requirements_dev.txt"
+
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install -r requirements_dev.txt
+
+      - name: Static typing with mypy
+        run: |
+          mypy --install-types --non-interactive --no-warn-unused-ignores .
diff --git a/.github/workflows/pages.yml b/.github/workflows/pages.yaml
similarity index 61%
rename from .github/workflows/pages.yml
rename to .github/workflows/pages.yaml
index f298f31..0c98c6d 100644
--- a/.github/workflows/pages.yml
+++ b/.github/workflows/pages.yaml
@@ -1,29 +1,27 @@
-# Simple workflow for deploying static content to GitHub Pages
+---
 name: Deploy static content to Pages
 
 on:
-  # Runs on pushes targeting the default branch
   push:
     branches:
       - main
 
-  # Allows you to run this workflow manually from the Actions tab
   workflow_dispatch:
 
-# Sets permissions of the GITHUB_TOKEN to allow deployment to GitHub Pages
 permissions:
-  actions: read
   contents: read
   pages: write
   id-token: write
+  actions: read
 
-# Allow one concurrent deployment
 concurrency:
   group: "pages"
   cancel-in-progress: true
 
+env:
+  PYTHON_VERSION: 3.12
+
 jobs:
-  # Single deploy job since we're just deploying
   deploy:
     environment:
       name: github-pages
@@ -31,17 +29,18 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       fail-fast: false
-      matrix:
-        python-version: ["3.12"]
     steps:
       - uses: actions/checkout@v4
-      - name: Set up Python ${{ matrix.python-version }}
+      - name: Set up Python
         uses: actions/setup-python@v5
         with:
-          python-version: ${{ matrix.python-version }}
+          python-version: ${{ env.PYTHON_VERSION }}
+          cache: "pip"
+          cache-dependency-path: "**/requirements_dev.txt"
       - name: Install dependencies
         run: |
-          if [ -f requirements_dev.txt ]; then pip install -r requirements_dev.txt; fi
+          python -m pip install --upgrade pip
+          pip install -r requirements_dev.txt
       - run: pdoc ./ical -o docs/
       - name: Setup Pages
         uses: actions/configure-pages@v5
diff --git a/.github/workflows/publish.yaml b/.github/workflows/publish.yaml
new file mode 100644
index 0000000..8e37333
--- /dev/null
+++ b/.github/workflows/publish.yaml
@@ -0,0 +1,51 @@
+---
+name: Upload Python Package
+
+on:
+  release:
+    types: [created]
+
+env:
+  PYTHON_VERSION: 3.12
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: ${{ env.PYTHON_VERSION }}
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install build --user
+      - name: Build a binary wheel and a source tarball
+        run: python3 -m build
+      - name: Store the distribution packages
+        uses: actions/upload-artifact@v4
+        with:
+          name: python-package-distributions
+          path: dist/
+
+  publish-to-pypi:
+    name: >-
+      Publish Python 🐍 distribution 📦 to PyPI
+    if: startsWith(github.ref, 'refs/tags/')  # only publish to PyPI on tag pushes
+    needs:
+      - build
+    runs-on: ubuntu-latest
+    environment:
+      name: pypi
+      url: https://pypi.org/p/ical
+    permissions:
+      id-token: write  # IMPORTANT: mandatory for trusted publishing
+    steps:
+      - name: Download all the dists
+        uses: actions/download-artifact@v4
+        with:
+          name: python-package-distributions
+          path: dist/
+      - name: Publish distribution 📦 to PyPI
+        uses: pypa/gh-action-pypi-publish@release/v1
diff --git a/.github/workflows/python-benchmark.yaml b/.github/workflows/python-benchmark.yaml
deleted file mode 100644
index 283b888..0000000
--- a/.github/workflows/python-benchmark.yaml
+++ /dev/null
@@ -1,32 +0,0 @@
-name: Python benchmarks
-
-on:
-  push:
-    branches:
-      - main
-  pull_request:
-    branches:
-      - main
-
-jobs:
-  build:
-
-    runs-on: ubuntu-latest
-    strategy:
-      fail-fast: false
-      matrix:
-        python-version: ["3.10", "3.11", "3.12"]
-
-    steps:
-    - uses: actions/checkout@v4
-    - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v5
-      with:
-        python-version: ${{ matrix.python-version }}
-    - name: Install dependencies
-      run: |
-        python -m pip install --upgrade pip
-        if [ -f requirements_dev.txt ]; then pip install -r requirements_dev.txt; fi
-    - name: Run benchmarks with pytest
-      run: |
-        pytest --benchmark-only
diff --git a/.github/workflows/python-package.yaml b/.github/workflows/python-package.yaml
deleted file mode 100644
index febc371..0000000
--- a/.github/workflows/python-package.yaml
+++ /dev/null
@@ -1,44 +0,0 @@
-name: Python package
-
-on:
-  push:
-    branches:
-      - main
-  pull_request:
-    branches:
-      - main
-
-jobs:
-  build:
-
-    runs-on: ubuntu-latest
-    strategy:
-      fail-fast: false
-      matrix:
-        python-version: ["3.10", "3.11", "3.12"]
-
-    steps:
-    - uses: actions/checkout@v4
-    - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v5
-      with:
-        python-version: ${{ matrix.python-version }}
-    - name: Install dependencies
-      run: |
-        python -m pip install --upgrade pip
-        if [ -f requirements_dev.txt ]; then pip install -r requirements_dev.txt; fi
-    - name: Test with pytest
-      run: |
-        pytest --cov=ical --cov-report=term-missing
-    - name: Test with pytest (pydantic v1)
-      run: |
-        pip3 install pydantic==1.10.3
-        pytest --cov=ical --cov-report=term-missing
-      if: matrix.python-version == '3.11'
-
-    - uses: codecov/codecov-action@v4
-      with:
-        token: ${{ secrets.CODECOV_TOKEN }}
-        env_vars: OS,PYTHON
-        fail_ci_if_error: true
-        verbose: true
diff --git a/.github/workflows/python-publish.yml b/.github/workflows/python-publish.yml
deleted file mode 100644
index 6e293c3..0000000
--- a/.github/workflows/python-publish.yml
+++ /dev/null
@@ -1,32 +0,0 @@
-name: Upload Python Package
-
-on:
-  release:
-    types:
-      - published
-
-permissions:
-  contents: read
-
-jobs:
-  deploy:
-
-    runs-on: ubuntu-latest
-
-    steps:
-    - uses: actions/checkout@v4
-    - name: Set up Python
-      uses: actions/setup-python@v5
-      with:
-        python-version: '3.x'
-    - name: Install dependencies
-      run: |
-        python -m pip install --upgrade pip
-        pip install build
-    - name: Build package
-      run: python -m build
-    - name: Publish package
-      uses: pypa/gh-action-pypi-publish@v1.8.14
-      with:
-        user: __token__
-        password: ${{ secrets.PYPI_API_TOKEN }}
diff --git a/.github/workflows/test.yaml b/.github/workflows/test.yaml
new file mode 100644
index 0000000..3130462
--- /dev/null
+++ b/.github/workflows/test.yaml
@@ -0,0 +1,40 @@
+---
+name: Test
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version: ["3.11", "3.12"]
+
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v5
+        with:
+          python-version: ${{ matrix.python-version }}
+          cache: "pip"
+          cache-dependency-path: "**/requirements_dev.txt"
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          if [ -f requirements_dev.txt ]; then pip install -r requirements_dev.txt; fi
+      - name: Test with pytest
+        run: |
+          pytest --cov=ical --cov-report=term-missing
+      - uses: codecov/codecov-action@v4
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}
+          env_vars: OS,PYTHON
+          fail_ci_if_error: true
+          verbose: true
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index e24ccc4..2fa2140 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -1,37 +1,50 @@
+---
 repos:
-- repo: https://github.com/pre-commit/pre-commit-hooks
-  rev: v4.6.0
-  hooks:
-  - id: trailing-whitespace
-    exclude: 'tests/testdata/.*yaml$'
-  - id: end-of-file-fixer
-  - id: check-yaml
-  - id: check-added-large-files
-- repo: https://github.com/charliermarsh/ruff-pre-commit
-  rev: 'v0.4.4'
-  hooks:
-  - id: ruff
-    args: [--fix, --exit-non-zero-on-fix]
-- repo: https://github.com/psf/black
-  rev: 24.4.2
-  hooks:
-  - id: black
-- repo: local
-  hooks:
-  - id: mypy
-    name: mypy
-    entry: "./run-mypy"
-    language: python
-    additional_dependencies: ["mypy==0.930"]
-    types: [python]
-    # use require_serial so that script
-    # is only called once per commit
-    require_serial: true
-- repo: https://github.com/codespell-project/codespell
-  rev: v2.2.6
-  hooks:
-    - id: codespell
-      exclude: |
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v4.6.0
+    hooks:
+      - id: trailing-whitespace
+        exclude: 'tests/testdata/.*yaml$'
+      - id: end-of-file-fixer
+      - id: check-yaml
+      - id: check-added-large-files
+  - repo: https://github.com/psf/black
+    rev: 24.4.2
+    hooks:
+      - id: black
+  - repo: https://github.com/charliermarsh/ruff-pre-commit
+    rev: v0.4.4
+    hooks:
+      - id: ruff
+        args:
+          - --fix
+          - --exit-non-zero-on-fix
+  - repo: local
+    hooks:
+      - id: mypy
+        name: mypy
+        entry: script/run-mypy.sh
+        language: script
+        types: [python]
+        require_serial: true
+  - repo: https://github.com/codespell-project/codespell
+    rev: v2.2.6
+    hooks:
+      - id: codespell
+        exclude: |
+
           (?x)^(
               tests/tzif/testdata/rfc8536-v3.yaml
           )$
+  - repo: https://github.com/adrienverge/yamllint.git
+    rev: v1.35.1
+    hooks:
+      - id: yamllint
+        exclude: '^tests/tool/testdata/.*\.yaml$'
+        args:
+          - -c
+          - ".yaml-lint.yaml"
+  - repo: https://github.com/asottile/setup-cfg-fmt
+    rev: v2.5.0
+    hooks:
+      - id: setup-cfg-fmt
diff --git a/.yaml-lint.yaml b/.yaml-lint.yaml
new file mode 100644
index 0000000..0577a9c
--- /dev/null
+++ b/.yaml-lint.yaml
@@ -0,0 +1,20 @@
+---
+ignore: |
+  venv
+  tests/testdata
+extends: default
+rules:
+  truthy:
+    allowed-values: ['true', 'false', 'on', 'yes']
+  comments:
+    min-spaces-from-content: 1
+  line-length: disable
+  braces:
+    min-spaces-inside: 0
+    max-spaces-inside: 1
+  brackets:
+    min-spaces-inside: 0
+    max-spaces-inside: 0
+  indentation:
+    spaces: 2
+    indent-sequences: consistent
diff --git a/mypy.ini b/mypy.ini
deleted file mode 100644
index e854ce8..0000000
--- a/mypy.ini
+++ /dev/null
@@ -1,24 +0,0 @@
-[mypy]
-plugins = pydantic.mypy
-ignore_missing_imports = True
-exclude = (venv|tests)
-check_untyped_defs = True
-disallow_any_generics = True
-disallow_incomplete_defs = True
-disallow_subclassing_any = True
-disallow_untyped_calls = True
-disallow_untyped_decorators = True
-disallow_untyped_defs = True
-no_implicit_optional = True
-no_implicit_reexport = True
-warn_return_any = True
-warn_unreachable = True
-warn_redundant_casts = True
-warn_unused_ignores = True
-warn_no_return = True
-
-[pydantic-mypy]
-init_forbid_extra = False
-init_typed = True
-warn_required_dynamic_aliases = True
-warn_untyped_fields = True
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..6ccdeca
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,39 @@
+[tool.mypy]
+plugins = "pydantic.mypy"
+exclude = [
+  "venv/",
+  "tests/",
+]
+platform = "linux"
+show_error_codes = true
+follow_imports = "normal"
+local_partial_types = true
+strict_equality = true
+no_implicit_optional = true
+warn_incomplete_stub = true
+warn_redundant_casts = true
+warn_unused_configs = true
+warn_unused_ignores = true
+disable_error_code = [
+    "import-untyped",
+]
+extra_checks = false
+check_untyped_defs = true
+disallow_incomplete_defs = true
+disallow_subclassing_any = true
+disallow_untyped_calls = true
+disallow_untyped_decorators = true
+disallow_untyped_defs = true
+warn_return_any = true
+warn_unreachable = true
+# Additional checks
+ignore_missing_imports = true
+disallow_any_generics = true
+no_implicit_reexport = true
+warn_no_return = true
+
+[tool.pydantic-mypy]
+init_forbid_extra = false
+init_typed = true
+warn_required_dynamic_aliases = true
+warn_untyped_fields = true
diff --git a/requirements_dev.txt b/requirements_dev.txt
index 537fa80..1121430 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -1,21 +1,22 @@
 -e .
-coverage==6.4.2
+black==24.4.2
+coverage==7.5.1
+mypy==1.10.0
+pdoc==14.4.0
+pip==24.0
+pre-commit==3.6.0
+pytest-cov==5.0.0
+pytest==8.2.0
+ruff==0.4.4
+
 emoji==2.2.0
 python-dateutil==2.8.2
 freezegun==1.2.1
-pdoc==12.1.0
-pip==22.1.2
 pydantic==2.0.3
 pyparsing==3.0.9
-pytest==7.1.2
-pytest-benchmark==3.4.1
-pytest-cov==3.0.0
+pytest-benchmark==4.0.0
 types-python-dateutil==2.8.19
-ruff==0.0.253
-black==22.10.0
 wheel==0.37.1
 PyYAML==6.0.1
 types-PyYAML==6.0.12.8
-pre-commit==3.6.0
-mypy==1.8.0
-syrupy==4.6.0
+syrupy==4.6.1
diff --git a/run-mypy b/run-mypy
deleted file mode 100755
index fc3804b..0000000
--- a/run-mypy
+++ /dev/null
@@ -1,10 +0,0 @@
-#!/usr/bin/env bash
-
-set -o errexit
-
-# Change directory to the project root directory.
-cd "$(dirname "$0")"
-
-pip3 install -r requirements_dev.txt --no-input --quiet
-
-mypy .
diff --git a/script/run-mypy.sh b/script/run-mypy.sh
new file mode 100755
index 0000000..eede4d7
--- /dev/null
+++ b/script/run-mypy.sh
@@ -0,0 +1,12 @@
+#!/usr/bin/env bash
+
+set -o errexit
+
+# other common virtualenvs
+my_path=$(git rev-parse --show-toplevel)
+
+if [ -f "${my_path}/venv/bin/activate" ]; then
+  . "${my_path}/venv/bin/activate"
+fi
+
+mypy ${my_path}