diff --git a/pyproject.toml b/pyproject.toml
index 6414b3e..5288b06 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,3 +1,37 @@
+[build-system]
+requires = [
+    "setuptools >= 64",
+    "setuptools_scm >= 6.4"
+]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = "sniffio"
+description = "Sniff out which async library your code is running under"
+readme = "README.rst"
+authors = [{name = "Nathaniel J. Smith", email = "njs@pobox.com"}]
+license = {text = "MIT OR Apache-2.0"}
+keywords = ["async", "trio", "asyncio"]
+classifiers = [
+    "License :: OSI Approved :: MIT License",
+    "License :: OSI Approved :: Apache Software License",
+    "Framework :: Trio",
+    "Framework :: AsyncIO",
+    "Operating System :: POSIX :: Linux",
+    "Operating System :: MacOS :: MacOS X",
+    "Operating System :: Microsoft :: Windows",
+    "Programming Language :: Python :: 3 :: Only",
+    "Programming Language :: Python :: Implementation :: CPython",
+    "Programming Language :: Python :: Implementation :: PyPy",
+    "Intended Audience :: Developers",
+    "Development Status :: 5 - Production/Stable",
+]
+requires-python = ">= 3.7"
+dynamic = ["version"]
+
+[tool.setuptools.dynamic]
+version = {attr = "sniffio._version.__version__"}
+
 [tool.towncrier]
 package = "sniffio"
 filename = "docs/source/history.rst"
diff --git a/setup.py b/setup.py
deleted file mode 100644
index 374839c..0000000
--- a/setup.py
+++ /dev/null
@@ -1,39 +0,0 @@
-from setuptools import setup, find_packages
-
-exec(open("sniffio/_version.py", encoding="utf-8").read())
-
-LONG_DESC = open("README.rst", encoding="utf-8").read()
-
-setup(
-    name="sniffio",
-    version=__version__,
-    description="Sniff out which async library your code is running under",
-    url="https://github.com/python-trio/sniffio",
-    long_description=LONG_DESC,
-    author="Nathaniel J. Smith",
-    author_email="njs@pobox.com",
-    license="MIT OR Apache-2.0",
-    packages=find_packages(),
-    package_data={"sniffio": ["py.typed"]},
-    keywords=[
-        "async",
-        "trio",
-        "asyncio",
-    ],
-    python_requires=">=3.7",
-    tests_require=['curio'],
-    classifiers=[
-        "License :: OSI Approved :: MIT License",
-        "License :: OSI Approved :: Apache Software License",
-        "Framework :: Trio",
-        "Framework :: AsyncIO",
-        "Operating System :: POSIX :: Linux",
-        "Operating System :: MacOS :: MacOS X",
-        "Operating System :: Microsoft :: Windows",
-        "Programming Language :: Python :: 3 :: Only",
-        "Programming Language :: Python :: Implementation :: CPython",
-        "Programming Language :: Python :: Implementation :: PyPy",
-        "Intended Audience :: Developers",
-        "Development Status :: 5 - Production/Stable",
-    ],
-)