diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..7e01ab2
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,3 @@
+[build-system]
+requires = ['setuptools', 'wheel']
+build-backend = 'setuptools.build_meta'
diff --git a/setup.cfg b/setup.cfg
index 0be943d..295519c 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,5 +1,23 @@
 [metadata]
+name = simplefractions
+version = 1.2.0
+url = "https://github.com/mdickinson/simplefractions"
+author = Mark Dickinson
+author_email = dickinsm@gmail.com
+classifiers =
+    License :: OSI Approved :: Apache Software License
+    Operating System :: OS Independent
+    Programming Language :: Python :: 3
+    Topic :: Scientific/Engineering :: Mathematics
 license_files = LICENSE
+description = "Find the simplest fraction for a given float or interval"
+long_description = file: README.md
+long_description_content_type = text/markdown
+keywords = fractions, continued fractions, approximation
+
+[options]
+packages = find:
+python_requires = >= 3.6
 
 [flake8]
 max-line-length = 88
diff --git a/setup.py b/setup.py
deleted file mode 100644
index 0c796b2..0000000
--- a/setup.py
+++ /dev/null
@@ -1,38 +0,0 @@
-# Copyright 2020 Mark Dickinson. All rights reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     https://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-import setuptools
-
-with open("README.md", "r", encoding="utf-8") as readme_file:
-    long_description = readme_file.read()
-
-
-setuptools.setup(
-    name="simplefractions",
-    version="1.1.1",
-    author="Mark Dickinson",
-    author_email="dickinsm@gmail.com",
-    description="Find the simplest fraction for a given float or interval",
-    long_description=long_description,
-    long_description_content_type="text/markdown",
-    url="https://github.com/mdickinson/simplefractions",
-    packages=setuptools.find_packages(),
-    classifiers=[
-        "License :: OSI Approved :: Apache Software License",
-        "Operating System :: OS Independent",
-        "Programming Language :: Python :: 3",
-        "Topic :: Scientific/Engineering :: Mathematics",
-    ],
-    python_requires=">=3.6",
-)