diff --git a/.github/workflows/docs-preview.yaml b/.github/workflows/docs-preview.yaml
new file mode 100644
index 0000000..28fe8ff
--- /dev/null
+++ b/.github/workflows/docs-preview.yaml
@@ -0,0 +1,16 @@
+name: RtD Docs Preview
+on:
+  pull_request_target:
+    types:
+      - opened
+
+permissions:
+  pull-requests: write
+
+jobs:
+  documentation-links:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: readthedocs/actions/preview@v1
+        with:
+          project-slug: "utctime"
diff --git a/.github/workflows/release.yaml b/.github/workflows/release.yaml
new file mode 100644
index 0000000..48c7d9f
--- /dev/null
+++ b/.github/workflows/release.yaml
@@ -0,0 +1,107 @@
+name: Release to PyPI / TestPyPi
+on:
+  workflow_dispatch:
+  push:
+    tags:
+      - "0.*"
+      - "1.*"
+
+defaults:
+  run:
+    shell: bash
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version:
+          - "3.9"
+          - "3.10"
+          - "3.11"
+          - "3.12"
+          - "3.13"
+    steps:
+      - uses: actions/checkout@v3
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v3
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: Install tox
+        run: |
+          pip install "tox>=4.5,<4.6"
+      - name: Run tox
+        run: |
+          tox --colored no --quiet
+
+  dist:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v2
+        with:
+          python-version: "3.9"
+      - name: Install build tools
+        run: python -m pip install build
+      - name: Build source and wheel distribution
+        run: python -m build --sdist --wheel --outdir dist/
+      - name: Upload distribution artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: dist
+          path: dist
+
+  verify-dist:
+    runs-on: ubuntu-latest
+    needs: dist
+    steps:
+      - name: Download dist artifact
+        uses: actions/download-artifact@v4
+        with:
+          name: dist
+          path: dist
+      - name: Verify dist files exist
+        run: ls dist/*
+      - name: Validate wheel distribution data
+        run: python -m zipfile --list dist/*.whl | grep --extended-regexp --silent 'utctime/__init__.py'
+
+  upload-to-testpypi:
+    runs-on: ubuntu-latest
+    needs:
+      - build
+      - verify-dist
+    environment:
+      name: testpypi
+      url: https://test.pypi.org/p/utctime
+    steps:
+      - name: Download dist artifact
+        uses: actions/download-artifact@v4
+        with:
+          name: dist
+          path: dist
+      - name: Publish distribution to Test PyPI
+        uses: pypa/gh-action-pypi-publish@release/v1
+        with:
+          password: ${{ secrets.TEST_PYPI_API_TOKEN }}
+          repository_url: https://test.pypi.org/legacy/
+
+  upload-to-pypi:
+    runs-on: ubuntu-latest
+    needs:
+      - build
+      - verify-dist
+    environment:
+      name: pypi
+      url: https://pypi.org/p/utctime
+    steps:
+      - name: Download dist artifact
+        uses: actions/download-artifact@v4
+        with:
+          name: dist
+          path: dist
+      - name: Publish distribution to PyPI
+        uses: pypa/gh-action-pypi-publish@release/v1
+        with:
+          password: ${{ secrets.PYPI_API_TOKEN }}
+          repository_url: https://upload.pypi.org/legacy/
diff --git a/.github/workflows/utctime.yaml b/.github/workflows/utctime.yaml
new file mode 100644
index 0000000..0560cd2
--- /dev/null
+++ b/.github/workflows/utctime.yaml
@@ -0,0 +1,38 @@
+name: Build
+on:
+  push:
+    branches: ["main"]
+  pull_request:
+    branches: ["*"]
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+defaults:
+  run:
+    shell: bash
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version:
+          - "3.9"
+          - "3.10"
+          - "3.11"
+          - "3.12"
+          - "3.13"
+    steps:
+      - uses: actions/checkout@v3
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v3
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: Install tox
+        run: |
+          pip install "tox>=4.5,<4.6"
+      - name: Run tox
+        run: |
+          tox --colored no --quiet
diff --git a/.python-version b/.python-version
index 5d6ed7f..dffc7a6 100644
--- a/.python-version
+++ b/.python-version
@@ -1,5 +1,5 @@
-3.7
-3.8
 3.9
 3.10
 3.11
+3.12
+3.13
diff --git a/pyproject.toml b/pyproject.toml
index 63626c9..6525555 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ version = "0.1.2-alpha"
 
 description = "A simple and type-safe way of working with UTC datetimes and ISO 8601 strings."
 
-requires-python = ">= 3.7"
+requires-python = ">= 3.9"
 readme = "README.rst"
 license = { file = "LICENSE" }
 classifiers = [
@@ -15,11 +15,11 @@ classifiers = [
     "License :: OSI Approved :: MIT License",
     "Programming Language :: Python",
     "Programming Language :: Python :: 3",
-    "Programming Language :: Python :: 3.7",
-    "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 :: Only",
     "Programming Language :: Python :: Implementation :: CPython",
     "Topic :: Software Development :: Libraries",
@@ -29,6 +29,9 @@ classifiers = [
 keywords = ["utc", "datetime", "iso", "iso8601", "time", "utility", "util"]
 dependencies = []
 
+[project.optional-dependencies]
+docs = ["sphinx-rtd-theme >= 1.2.0", "pytest >= 6.2.0"]
+
 [project.urls]
 Documentation = "https://utctime.readthedocs.io"
 Source = "https://github.com/dmayo3/utctime"
@@ -46,13 +49,6 @@ tag = true
 push = false
 
 [tool.bumpver.file_patterns]
-"pyproject.toml" = [
-    'current_version = "{version}"',
-    'version = "{version}"',
-]
-"utctime/__init__.py" = [
-    "{version}",
-]
-"README.rst" = [
-    "{version}",
-]
+"pyproject.toml" = ['current_version = "{version}"', 'version = "{version}"']
+"utctime/__init__.py" = ["{version}"]
+"README.rst" = ["{version}"]
diff --git a/tox.ini b/tox.ini
index 4a5d8d7..b6fbe19 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,7 +1,7 @@
 [tox]
 requires =
     tox>=4
-env_list = format, lint, mypy, py{37,38,39,310,311}, docs
+env_list = format, lint, mypy, py{39,310,311,312,313}, docs
 
 [testenv]
 description = run unit tests
@@ -37,7 +37,7 @@ commands =
 [testenv:pylint]
 description = code linting
 deps =
-    pylint>=2.17.0
+    pylint>=3.3.2,<3.4.0
 commands = pylint {posargs:utctime tests}
 
 [testenv:flake8]
@@ -69,8 +69,8 @@ per-file-ignores =
 description = build sphinx docs
 changedir = docs
 deps =
-  sphinx>=6.0,<6.1
-  sphinx-rtd-theme>=1.2.0
+  sphinx>=6.2,<6.3
+  sphinx-rtd-theme>=3.0.2,<3.1.0
 commands =
   sphinx-build -W -b doctest -d {envtmpdir}/doctrees . {envtmpdir}/html
   sphinx-build -v -W -b html -d {envtmpdir}/doctrees . {envtmpdir}/html
diff --git a/utctime/utctime.py b/utctime/utctime.py
index d8f3e47..a2ca67c 100644
--- a/utctime/utctime.py
+++ b/utctime/utctime.py
@@ -34,6 +34,7 @@ class UtcTime:
     methods to create :class:`utctime.UtcTime` instances.
     """
 
+    # pylint: disable=too-many-positional-arguments
     def __init__(
         self: UtcTime,
         year: int,
@@ -143,6 +144,7 @@ def todatetime(self: UtcTime) -> datetime:
         """Converts back to a regular :py:class:`datetime.datetime` with a UTC timezone."""
         return self._dt
 
+    # pylint: disable=too-many-positional-arguments
     def replace(
         self: UtcTime,
         year: Optional[int] = None,