diff --git a/poetry.lock b/poetry.lock
deleted file mode 100644
index 9763e4d..0000000
--- a/poetry.lock
+++ /dev/null
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-]
-typing-extensions = [
-    {file = "typing_extensions-4.0.1-py3-none-any.whl", hash = "sha256:7f001e5ac290a0c0401508864c7ec868be4e701886d5b573a9528ed3973d9d3b"},
-    {file = "typing_extensions-4.0.1.tar.gz", hash = "sha256:4ca091dea149f945ec56afb48dae714f21e8692ef22a395223bcd328961b6a0e"},
-]
-virtualenv = [
-    {file = "virtualenv-20.13.0-py2.py3-none-any.whl", hash = "sha256:339f16c4a86b44240ba7223d0f93a7887c3ca04b5f9c8129da7958447d079b09"},
-    {file = "virtualenv-20.13.0.tar.gz", hash = "sha256:d8458cf8d59d0ea495ad9b34c2599487f8a7772d796f9910858376d1600dd2dd"},
-]
-zipp = [
-    {file = "zipp-3.6.0-py3-none-any.whl", hash = "sha256:9fe5ea21568a0a70e50f273397638d39b03353731e6cbbb3fd8502a33fec40bc"},
-    {file = "zipp-3.6.0.tar.gz", hash = "sha256:71c644c5369f4a6e07636f0aa966270449561fcea2e3d6747b8d23efaa9d7832"},
-]
diff --git a/pyproject.toml b/pyproject.toml
index 1486f3f..d3b77da 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,48 +1,124 @@
-[tool.poetry]
-name = "castutils"
-version = "0.0.0"
-description = "Variable transformation and casting utilities (Python)"
-authors = ["Shane Spencer <305301+whardier@users.noreply.github.com>"]
-license = "MIT"
-readme = "README.md"
-homepage = "https://github.com/whardier/castutils-python"
-repository = "https://github.com/whardier/castutils-python"
+# toml-sort --in-place --sort-inline-arrays --sort-inline-tables --sort-table-keys --spaces-indent-inline-array 4 --trailing-comma-inline-array ./pyproject.toml
+# taplo format pyproject.toml
+
+[build-system]
+build-backend = "setuptools.build_meta"
+requires = ["setuptools-scm[toml]~=8.2", "setuptools~=80.9", "wheel~=0.45"]
+
+[project]
+authors = [
+  { email = "305301+whardier@users.noreply.github.com", name = "Shane R. Spencer" },
+]
+classifiers = [
+  "Development Status :: 5 - Production/Stable",
+  "Intended Audience :: Developers",
+  "Operating System :: OS Independent",
+  "Programming Language :: Python :: 3.10",
+  "Programming Language :: Python :: 3.11",
+  "Programming Language :: Python :: 3.12",
+  "Programming Language :: Python :: 3.9",
+  "Topic :: Software Development :: Libraries :: Python Modules",
+  "Topic :: Software Development :: Libraries",
+  "Typing :: Typed",
+]
+description = "Variable transformation and casting utilities"
+dynamic = ["version"]
 keywords = [
   "cast",
   "coerce",
   "coercion",
   "transform",
   "transformation",
-  "typing",
   "typecast",
+  "typing",
 ]
-classifiers = [
-  "Development Status :: 5 - Production/Stable",
-  "Intended Audience :: Developers",
-  "Operating System :: OS Independent",
+license = "MIT"
+name = "castutils"
+readme = "README.md"
+requires-python = ">=3.9"
+
+[project.optional-dependencies]
+deployment = ["build~=1.2", "twine~=6.1"]
+development = [
+  "bandit[toml,yaml]~=1.8",
+  "black[colorama]~=25.1",
+  "commitizen~=4.2",
+  "coverage[toml]~=7.6",
+  "flake8-absolute-import~=1.0",
+  "flake8-bandit~=4.1",
+  "flake8-bugbear~=24.12",
+  "flake8-builtins~=2.5",
+  "flake8-comprehensions~=3.16",
+  "flake8-isort~=6.1",
+  "flake8-print~=5.0",
+  "flake8-pyproject~=1.2",
+  "flake8-return~=1.2",
+  "flake8-use-pathlib~=0.3",
+  "flake8~=7.1",
+  "hypothesis[cli,pytest,zoneinfo]~=6.125",
+  "isort[colors,plugins]~=6.0",
+  "mypy[install-types]~=1.14",
+  "pep8-naming~=0.14",
+  "pre-commit~=4.1",
+  "pycln~=2.5",
+  "pytest-cov~=6.0",
+  "pytest-env~=1.1",
+  "pytest-mock~=3.14",
+  "pytest-xdist[psutil]~=3.6",
+  "pytest~=8.3",
+  "taplo~=0.9",
+  "toml-sort~=0.24",
+  "tox~=4.24",
 ]
 
-[tool.poetry.urls]
-"Funding" = "https://github.com/sponsors/whardier"
+[project.urls]
+Changelog = "https://github.com/whardier/castutils-python/blob/master/CHANGELOG.md"
+Funding = "https://github.com/sponsors/whardier"
+Issues = "https://github.com/whardier/castutils-python/issues"
+Repository = "https://github.com/whardier/castutils-python"
+homepage = "https://github.com/whardier/castutils-python"
 
-[tool.poetry-dynamic-versioning]
-enable = true
-vcs = "git"
-style = "semver"
+[tool.black]
+line-length = 120
 
-[tool.poetry.dependencies]
-python = "^3.7"
+[tool.commitizen]
+github_repo = "whardier/castutils-python"
+major_version_zero = true
+tag_format = "v$version"
+update_changelog_on_bump = true
+version_provider = "scm"
+version_scheme = "pep440"
 
-[tool.poetry.dev-dependencies]
-black = "^21.12b0"
-flake8 = "^4.0.1"
-isort = "^5.10.1"
-pre-commit = "^2.16.0"
-mypy = "^0.930"
-autoflake = "^1.4"
-pytest = "^6.2.5"
-hypothesis = "^6.34.1"
+[tool.coverage.run]
+omit = ["tests/*"]
 
-[build-system]
-requires = ["poetry-core>=1.0.0", "poetry-dynamic-versioning"]
-build-backend = "poetry.core.masonry.api"
+[tool.flake8]
+doctests = true
+max-line-length = 120
+per-file-ignores = """
+    tests/**: S101
+    src/**: A005
+"""
+
+[tool.isort]
+line_length = 120
+profile = "black"
+
+[tool.mypy]
+
+[tool.pytest.ini_options]
+addopts = "--doctest-modules --cov=pdf_template_management --cov-report term-missing --durations=100 --durations-min=0.5"
+filterwarnings = [
+  # Ignore deprecation warnings ... we are already so deprecated that we can't fix them all.
+  "ignore::DeprecationWarning",
+]
+testpaths = ["src", "tests"]
+typeguard-collection-check-strategy = "ALL_ITEMS"
+typeguard-forward-ref-policy = "ERROR"
+typeguard-packages = "castutils"
+
+[tool.setuptools.packages.find]
+where = ["src"]
+
+[tool.setuptools_scm]
+version_scheme = "python-simplified-semver"
diff --git a/setup.cfg b/setup.cfg
deleted file mode 100644
index 62af7f6..0000000
--- a/setup.cfg
+++ /dev/null
@@ -1,11 +0,0 @@
-[flake8]
-doctests = true
-exclude = .git,.tox,__pycache__,.eggs,build,tests
-max-line-length = 88
-per-file-ignores =
-    tests/*:S101
-
-[isort]
-profile = black
-src_paths=src,tests
-
diff --git a/tests/py.typed b/tests/__init__.py
similarity index 100%
rename from tests/py.typed
rename to tests/__init__.py