diff --git a/.gitignore b/.gitignore
index d6b84d0..f69dfd5 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,4 @@
+*~
+*.pyc
+dist/
 rattail_mailchimp.egg-info/
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..31913de
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,58 @@
+
+[build-system]
+requires = ["hatchling"]
+build-backend = "hatchling.build"
+
+
+[project]
+name = "rattail-mailchimp"
+version = "0.2.1"
+description = "Rattail Software Interfaces for MailChimp"
+readme = "README.rst"
+authors = [{name = "Lance Edgar", email = "lance@edbob.org"}]
+license = {text = "GNU GPL v3+"}
+classifiers = [
+        "Development Status :: 4 - Beta",
+        "Environment :: Console",
+        "Environment :: Web Environment",
+        "Intended Audience :: Developers",
+        "License :: OSI Approved :: GNU General Public License v3 or later (GPLv3+)",
+        "Natural Language :: English",
+        "Operating System :: OS Independent",
+        "Programming Language :: Python",
+        "Programming Language :: Python :: 3",
+        "Topic :: Office/Business",
+        "Topic :: Software Development :: Libraries :: Python Modules",
+]
+dependencies = [
+        "mailchimp3",
+        "rattail",
+]
+
+
+[project.entry-points."rattail.config.extensions"]
+rattail_mailchimp = "rattail_mailchimp.config:MailchimpConfigExtension"
+
+
+[project.entry-points."rattail.subcommands"]
+import-mailchimp = "rattail_mailchimp.commands:ImportMailChimp"
+
+
+[project.entry-points."rattail.typer_imports"]
+rattail_mailchimp = "rattail_mailchimp.commands"
+
+
+[project.entry-points."rattail.emails"]
+rattail_mailchimp = "rattail_mailchimp.emails"
+
+
+[project.urls]
+Homepage = "https://rattailproject.org"
+Repository = "https://kallithea.rattailproject.org/rattail-project/rattail-mailchimp"
+Changelog = "https://kallithea.rattailproject.org/rattail-project/rattail-mailchimp/files/master/CHANGELOG.md"
+
+
+[tool.commitizen]
+version_provider = "pep621"
+tag_format = "v$version"
+update_changelog_on_bump = true
diff --git a/rattail_mailchimp/_version.py b/rattail_mailchimp/_version.py
index 53d3efe..1c3638a 100644
--- a/rattail_mailchimp/_version.py
+++ b/rattail_mailchimp/_version.py
@@ -1,3 +1,6 @@
 # -*- coding: utf-8; -*-
 
-__version__ = '0.2.1'
+from importlib.metadata import version
+
+
+__version__ = version('rattail-mailchimp')
diff --git a/setup.cfg b/setup.cfg
deleted file mode 100644
index 8425cd6..0000000
--- a/setup.cfg
+++ /dev/null
@@ -1,48 +0,0 @@
-# -*- coding: utf-8; -*-
-
-[metadata]
-name = rattail-mailchimp
-version = attr: rattail_mailchimp.__version__
-author = Lance Edgar
-author_email = lance@edbob.org
-url = https://rattailproject.org/
-license = GNU GPL v3
-description = Rattail Software Interfaces for MailChimp
-long_description = file: README.rst
-classifiers =
-        Development Status :: 4 - Beta
-        Environment :: Console
-        Environment :: Web Environment
-        Intended Audience :: Developers
-        License :: OSI Approved :: GNU General Public License v3 or later (GPLv3+)
-        Natural Language :: English
-        Operating System :: OS Independent
-        Programming Language :: Python
-        Programming Language :: Python :: 3
-        Topic :: Office/Business
-        Topic :: Software Development :: Libraries :: Python Modules
-
-
-[options]
-install_requires =
-        mailchimp3
-        rattail
-
-packages = find:
-include_package_data = True
-zip_safe = False
-
-
-[options.entry_points]
-
-rattail.config.extensions =
-        rattail_mailchimp = rattail_mailchimp.config:MailchimpConfigExtension
-
-rattail.subcommands =
-        import-mailchimp = rattail_mailchimp.commands:ImportMailChimp
-
-rattail.typer_imports =
-        rattail_mailchimp = rattail_mailchimp.commands
-
-rattail.emails =
-        rattail_mailchimp = rattail_mailchimp.emails
diff --git a/setup.py b/setup.py
deleted file mode 100644
index 615bc06..0000000
--- a/setup.py
+++ /dev/null
@@ -1,26 +0,0 @@
-# -*- coding: utf-8; -*-
-################################################################################
-#
-#  Rattail -- Retail Software Framework
-#  Copyright © 2010-2023 Lance Edgar
-#
-#  This file is part of Rattail.
-#
-#  Rattail is free software: you can redistribute it and/or modify it under the
-#  terms of the GNU General Public License as published by the Free Software
-#  Foundation, either version 3 of the License, or (at your option) any later
-#  version.
-#
-#  Rattail is distributed in the hope that it will be useful, but WITHOUT ANY
-#  WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
-#  FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
-#  details.
-#
-#  You should have received a copy of the GNU General Public License along with
-#  Rattail.  If not, see <http://www.gnu.org/licenses/>.
-#
-################################################################################
-
-from setuptools import setup
-
-setup()
diff --git a/tasks.py b/tasks.py
index 577dd82..912f111 100644
--- a/tasks.py
+++ b/tasks.py
@@ -30,17 +30,15 @@ import shutil
 from invoke import task
 
 
-here = os.path.abspath(os.path.dirname(__file__))
-exec(open(os.path.join(here, 'rattail_mailchimp', '_version.py')).read())
-
-
 @task
 def release(c):
     """
     Release a new version of 'rattail-mailchimp'.
     """
-    shutil.rmtree('rattail_mailchimp.egg-info')
+    if os.path.exists('dist'):
+        shutil.rmtree('dist')
+    if os.path.exists('rattail_mailchimp.egg-info'):
+        shutil.rmtree('rattail_mailchimp.egg-info')
     c.run('python -m build --sdist')
 
-    filename = f'rattail_mailchimp-{__version__}.tar.gz'
-    c.run('twine upload dist/{}'.format(filename))
+    c.run('twine upload dist/*')