diff --git a/pyproject.toml b/pyproject.toml
index 470ed2c..a7e0cb2 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,7 +1,41 @@
 [build-system]
-requires = ["setuptools"]
+requires = ["setuptools>=77"]
 build-backend = "setuptools.build_meta"
 
+[project]
+name = "justbytes"
+authors = [{name = "Anne Mulhern", email = "amulhern@redhat.com"}]
+description = "computing with and displaying bytes"
+license = "LGPL-2.1-or-later"
+classifiers = [
+    "Development Status :: 2 - Pre-Alpha",
+    "Intended Audience :: Developers",
+    "Operating System :: POSIX :: Linux",
+    "Programming Language :: Python",
+    "Programming Language :: Python :: 3",
+    "Programming Language :: Python :: Implementation :: CPython",
+    "Topic :: Software Development :: Libraries",
+    "Topic :: System :: Hardware",
+    "Topic :: System :: Operating System Kernels :: Linux",
+]
+urls = {Homepage = "https://github.com/mulkieran/justbytes"}
+requires-python = ">=3.12"
+dependencies = ["justbases>=0.13"]
+dynamic = ["version"]
+
+[project.readme]
+file = "README.rst"
+content-type = "text/x-rst"
+
+[tool.setuptools]
+package-dir = {"" = "src"}
+packages = ["justbytes"]
+platforms = ["Linux"]
+include-package-data = false
+
+[tool.setuptools.dynamic]
+version = {attr = "justbytes.version.__version__"}
+
 [tool.ruff]
 target-version = "py312"
 line-length = 88
diff --git a/setup.cfg b/setup.cfg
deleted file mode 100644
index f934029..0000000
--- a/setup.cfg
+++ /dev/null
@@ -1,33 +0,0 @@
-[metadata]
-name = justbytes
-author = Anne Mulhern
-author_email = amulhern@redhat.com
-url = https://github.com/mulkieran/justbytes
-description = "computing with and displaying bytes"
-license = LGPL-2.1-or-later
-long_description = file: README.rst
-long_description_content_type = text/x-rst
-version = attr: justbytes.version.__version__
-platforms =
-  Linux
-classifiers =
-  Development Status :: 2 - Pre-Alpha
-  Intended Audience :: Developers
-  Operating System :: POSIX :: Linux
-  Programming Language :: Python
-  Programming Language :: Python :: 3
-  Programming Language :: Python :: Implementation :: CPython
-  Topic :: Software Development :: Libraries
-  Topic :: System :: Hardware
-  Topic :: System :: Operating System Kernels :: Linux
-
-[options]
-python_requires = >=3.12
-install_requires =
-  justbases>=0.13
-
-package_dir =
-  =src
-
-packages =
-  justbytes
diff --git a/setup.py b/setup.py
deleted file mode 100644
index 82aed6a..0000000
--- a/setup.py
+++ /dev/null
@@ -1,25 +0,0 @@
-# -*- coding: utf-8 -*-
-# Copyright (C) 2015 - 2019 Red Hat, Inc.
-#
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or any later version.
-#
-# This library 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
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this library; If not, see <http://www.gnu.org/licenses/>.
-#
-# Red Hat Author(s): Anne Mulhern <amulhern@redhat.com>
-
-"""
-Python packaging file for setup tools.
-"""
-
-import setuptools
-
-setuptools.setup()