diff --git a/MANIFEST.in b/MANIFEST.in
deleted file mode 100644
index 1aba38f..0000000
--- a/MANIFEST.in
+++ /dev/null
@@ -1 +0,0 @@
-include LICENSE
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..678fda6
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,29 @@
+[build-system]
+requires = ["setuptools>=61.0.0"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = "mypy_extensions"
+version = "1.0.0-dev"
+description = "Type system extensions for programs checked with the mypy type checker."
+readme = "README.md"
+license = {file = "LICENSE"}
+requires-python = ">=3.7"
+authors = [
+    {name = "The mypy developers", email = "jukka.lehtosalo@iki.fi"},
+]
+classifiers = [
+    "Development Status :: 5 - Production/Stable",
+    "Environment :: Console",
+    "Intended Audience :: Developers",
+    "License :: OSI Approved :: MIT License",
+    "Programming Language :: Python :: 3",
+    "Programming Language :: Python :: 3.7",
+    "Programming Language :: Python :: 3.8",
+    "Programming Language :: Python :: 3.9",
+    "Programming Language :: Python :: 3.10",
+    "Programming Language :: Python :: 3.11",
+    "Topic :: Software Development",
+]
+[project.urls]
+Repository = "https://github.com/python/mypy_extensions"
diff --git a/setup.cfg b/setup.cfg
deleted file mode 100644
index aa76bae..0000000
--- a/setup.cfg
+++ /dev/null
@@ -1,2 +0,0 @@
-[bdist_wheel]
-universal=0
diff --git a/setup.py b/setup.py
deleted file mode 100644
index 5bd5f0f..0000000
--- a/setup.py
+++ /dev/null
@@ -1,39 +0,0 @@
-from setuptools import setup
-
-version = '1.0.0-dev'
-description = 'Type system extensions for programs checked with the mypy type checker.'
-long_description = '''
-Mypy Extensions
-===============
-
-The "mypy_extensions" module defines extensions to the standard "typing" module
-that are supported by the mypy type checker and the mypyc compiler.
-'''.lstrip()
-
-classifiers = [
-    'Development Status :: 5 - Production/Stable',
-    'Environment :: Console',
-    'Intended Audience :: Developers',
-    'License :: OSI Approved :: MIT License',
-    'Programming Language :: Python :: 3',
-    'Programming Language :: Python :: 3.7',
-    'Programming Language :: Python :: 3.8',
-    'Programming Language :: Python :: 3.9',
-    'Programming Language :: Python :: 3.10',
-    'Programming Language :: Python :: 3.11',
-    'Topic :: Software Development',
-]
-
-setup(
-    name='mypy_extensions',
-    python_requires='>=3.7',
-    version=version,
-    description=description,
-    long_description=long_description,
-    author='The mypy developers',
-    author_email='jukka.lehtosalo@iki.fi',
-    url='https://github.com/python/mypy_extensions',
-    license='MIT License',
-    py_modules=['mypy_extensions'],
-    classifiers=classifiers,
-)