diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..088dbc0
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,73 @@
+# pyproject.toml
+[tool.poetry]
+name = "hsparse"
+description = "Scripts for parsing Hubspot data."
+authors = [
+    "Jeff Moe <moe@libre.is>"
+]
+license = "MIT"
+classifiers = [
+    "Development Status :: 3 - Alpha",
+    "Environment :: Console",
+    "Intended Audience :: Developers",
+    "Intended Audience :: System Administrators",
+    "License :: OSI Approved :: MIT License",
+    "Natural Language :: English",
+    "Operating System :: POSIX :: Linux",
+    "Programming Language :: Python :: 3",
+    "Topic :: System :: Systems Administration",
+    "Topic :: Utilities",
+]
+packages = [
+    { include = "hsparse" },
+]
+readme = "README.md"
+version = "0.0.1"
+
+
+[tool.poetry.dependencies]
+python = "^3.10"
+setuptools_scm = "*"
+
+
+[build-system]
+requires = ["poetry-core", "setuptools_scm"]
+build-backend = "poetry.core.masonry.api"
+
+[tool.poetry.scripts]
+hsparse = "hsparse.main:parse_csv_contacts"
+
+[tool.poetry.urls]
+homepage = "https://libre.is/libre/hsparse"
+documentation = "https://libre.is/libre/hsparse"
+repository = "https://libre.is/libre/hsparse"
+issues = "https://libre.is/libre/hsparse/issues"
+changelog = "https://libre.is/libre/hsparse/raw/branch/main/CHANGELOG.txt"
+
+[options.packages.find]
+include = "hsparse"
+
+[options.package_data]
+hsparse = "_version.py"
+
+[tool.poetry.dev-dependencies]
+black = "*"
+poetry = "*"
+pyprof2calltree = "*"
+ruff = "*"
+twine = "*"
+
+[tool.setuptools_scm]
+write_to = "hsparse/_version.py"
+
+[tool.ruff]
+line-length = 88
+
+[tool.ruff.lint]
+select = [
+    "E",
+    "W",
+    "F",
+]
+
+ignore = [ "E501" ]