diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..d99a459
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,44 @@
+[build-system]
+requires = ["setuptools>=64.0.0", "wheel"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = "mailmerge"
+version = "2.2.3"
+description = "A simple, command line mail merge tool"
+keywords = ["mail merge", "mailmerge", "email"]
+authors = [{ email = "awdeorio@umich.edu" }, { name = "Andrew DeOrio" }]
+license = {file = "LICENSE"}
+readme = "README.md"
+requires-python = ">=3.6"
+dependencies = [
+    "click",
+    "jinja2",
+    "markdown",
+    "html5lib"
+]
+
+[project.optional-dependencies]
+dev = [
+    "twine",
+    "tox",
+]
+test = [
+    "check-manifest",
+    "freezegun",
+    "pycodestyle",
+    "pydocstyle",
+    "pylint",
+    "pytest",
+    "pytest-cov",
+    "pytest-mock",
+]
+
+[project.scripts]
+mailmerge = "mailmerge.__main__:main"
+
+[project.urls]
+homepage = "https://github.com/awdeorio/mailmerge/"
+
+[tool.setuptools]
+packages = ["mailmerge"]
diff --git a/setup.py b/setup.py
index 855bd1f..d037f14 100644
--- a/setup.py
+++ b/setup.py
@@ -1,53 +1,5 @@
-"""Mailmerge build and install configuration."""
-from pathlib import Path
-import setuptools
+"""Support legacy tools."""
 
+from setuptools import setup
 
-# Read the contents of README file
-PROJECT_DIR = Path(__file__).parent
-README = PROJECT_DIR/"README.md"
-LONG_DESCRIPTION = README.open(encoding="utf8").read()
-
-
-setuptools.setup(
-    name="mailmerge",
-    description="A simple, command line mail merge tool",
-    long_description=LONG_DESCRIPTION,
-    long_description_content_type="text/markdown",
-    version="2.2.3",
-    author="Andrew DeOrio",
-    author_email="awdeorio@umich.edu",
-    url="https://github.com/awdeorio/mailmerge/",
-    license="MIT",
-    packages=["mailmerge"],
-    keywords=["mail merge", "mailmerge", "email"],
-    install_requires=[
-        "click",
-        "jinja2",
-        "markdown",
-        "html5lib"
-    ],
-    extras_require={
-        "dev": [
-            "pdbpp",
-            "twine",
-            "tox",
-        ],
-        "test": [
-            "check-manifest",
-            "freezegun",
-            "pycodestyle",
-            "pydocstyle",
-            "pylint",
-            "pytest",
-            "pytest-cov",
-            "pytest-mock",
-        ],
-    },
-    python_requires='>=3.6',
-    entry_points={
-        "console_scripts": [
-            "mailmerge = mailmerge.__main__:main",
-        ]
-    },
-)
+setup()