diff --git a/Makefile b/Makefile
index 2578ee7..9a7956e 100644
--- a/Makefile
+++ b/Makefile
@@ -97,7 +97,7 @@ clean-test: ## remove test and coverage artifacts
 
 .PHONY: dist
 dist: clean-build ## builds source and wheel package
-	python setup.py sdist bdist_wheel
+	python scripts/make-wheel.py
 	twine check dist/*
 
 .PHONY: release
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..2234b5e
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,91 @@
+[build-system]
+requires = ["setuptools>=80", "setuptools-scm>=8"]
+build-backend = "setuptools.build_meta"
+
+[tool.setuptools_scm]
+version_file = "cloup/_version.py"
+
+[project]
+name = "cloup"
+dynamic = ["version"]
+
+description = "Adds features to Click: option groups, constraints, subcommand sections and help themes."
+readme = { file = "README.rst", content-type = "text/x-rst" }
+license = { text = "BSD 3-Clause" }
+
+requires-python = ">= 3.9"
+authors = [
+    { name = "Gianluca Gippetto", email = "gianluca.gippetto@gmail.com" },
+]
+
+classifiers = [
+    "Intended Audience :: Developers",
+    "License :: OSI Approved :: BSD License",
+    "Natural Language :: English",
+    "Programming Language :: Python :: 3",
+    "Programming Language :: Python :: 3.9",
+    "Programming Language :: Python :: 3.10",
+    "Programming Language :: Python :: 3.11",
+    "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3.13",
+]
+
+
+dependencies = [
+    "click>=8.0,<9.0",
+    "typing_extensions; python_version <= '3.10'",
+]
+
+
+[dependency-groups]
+docs = [
+    "furo",
+    "sphinx",
+    "sphinx-autoapi",
+    "sphinx-autobuild",
+    "sphinx-panels",
+    "sphinx-copybutton",
+    "sphinx-version-warning",
+    "sphinx-issues",
+]
+
+test = [
+    "pytest",
+    "pytest-cov",
+    "pytest-html",
+]
+
+dev = [
+    "build",
+    "flake8",
+    "flake8-pyproject",
+    "mypy",
+    "setuptools-scm",
+    "tox<4",
+    "twine",
+    {include-group = "docs"},
+    {include-group = "test"},
+]
+
+
+[tool.flake8]
+exclude = "docs"
+max-line-length = 90
+
+ignore = [
+    "E241", 
+    "E251", 
+    "W503",
+]
+
+[tool.mypy]
+ignore_missing_imports = true
+
+
+[tool.coverage.report]
+exclude_lines = [
+    "pragma: no covver",
+    "raise NotImplementedError",
+    "...",
+    "if TYPE_CHECKING:",
+]
diff --git a/scripts/make-wheel.py b/scripts/make-wheel.py
new file mode 100644
index 0000000..8f72f23
--- /dev/null
+++ b/scripts/make-wheel.py
@@ -0,0 +1,37 @@
+import sys
+import contextlib
+import shutil
+import subprocess
+from pathlib import Path
+
+
+@contextlib.contextmanager
+def backup():
+    saved = []
+
+    def save(path: Path):
+        saved.append((path, path.parent / f"{path.name}.bck"))
+        shutil.copyfile(*saved[-1])
+        return saved[-1][0]
+
+    try:
+        yield save
+    finally:
+        for dst, src in saved:
+            shutil.copyfile(src, dst)
+            src.unlink()
+
+
+def process():
+    with backup() as save:
+        readme = save(Path("README.rst"))
+        print("massaging {readme} ..")
+        txt = readme.read_text()
+        readme.write_text(txt[txt.find(".. docs-index-start") :])
+
+        print("creating wheel ..")
+        subprocess.check_call([sys.executable, "-m", "build", "."])
+
+
+if __name__ == "__main__":
+    process()
diff --git a/setup.cfg b/setup.cfg
deleted file mode 100644
index 974fe9d..0000000
--- a/setup.cfg
+++ /dev/null
@@ -1,20 +0,0 @@
-[bdist_wheel]
-universal = 1
-
-[flake8]
-exclude = docs
-max_line_length = 90
-ignore = E241, E251, W503
-
-[aliases]
-test = pytest
-
-[mypy]
-ignore_missing_imports = True
-
-[coverage:report]
-exclude_lines =
-    pragma: no cover
-    raise NotImplementedError
-    \.\.\.
-    if TYPE_CHECKING:
diff --git a/setup.py b/setup.py
deleted file mode 100644
index be9445f..0000000
--- a/setup.py
+++ /dev/null
@@ -1,52 +0,0 @@
-#!/usr/bin/env python
-from pathlib import Path
-
-from setuptools import find_packages, setup
-
-
-def make_long_description(write_file=False):
-    readme = Path('README.rst').read_text(encoding='utf-8')
-    # PyPI doesn't support the `raw::` directive. Skip it.
-    start = readme.find('.. docs-index-start')
-    long_description = readme[start:]
-    if write_file:
-        Path('PYPI_README.rst').write_text(long_description, encoding='utf-8')
-    return long_description
-
-
-setup(
-    name='cloup',
-    setup_requires=['setuptools_scm'],
-    use_scm_version={
-        'write_to': 'cloup/_version.py'
-    },
-    author='Gianluca Gippetto',
-    author_email='gianluca.gippetto@gmail.com',
-    description="Adds features to Click: option groups, constraints, subcommand "
-                "sections and help themes.",
-    long_description_content_type='text/x-rst',
-    long_description=make_long_description(),
-    url='https://github.com/janLuke/cloup',
-    license="BSD 3-Clause",
-    keywords=['CLI', 'click', 'argument groups', 'option groups', 'constraints',
-              'help colors', 'help themes', 'help styles'],
-    classifiers=[
-        'Intended Audience :: Developers',
-        'License :: OSI Approved :: BSD License',
-        'Natural Language :: English',
-        'Programming Language :: Python :: 3',
-        'Programming Language :: Python :: 3.9',
-        'Programming Language :: Python :: 3.10',
-        'Programming Language :: Python :: 3.11',
-        'Programming Language :: Python :: 3.12',
-        'Programming Language :: Python :: 3.13',
-    ],
-    packages=find_packages(include=['cloup', 'cloup.*']),
-    zip_safe=False,
-    include_package_data=True,
-    python_requires='>=3.9',
-    install_requires=[
-        'click >= 8.0, < 9.0',
-        'typing_extensions; python_version<="3.10"',
-    ],
-)
diff --git a/tox.ini b/tox.ini
index 4e0dafa..fa3b892 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,4 +1,5 @@
 [tox]
+isolated_build = true
 envlist =
   lint
   mypy
@@ -35,7 +36,9 @@ commands =
 
 [testenv:lint]
 skip_install = true
-deps = flake8
+deps =
+    flake8
+    flake8-pyproject
 commands = flake8 cloup tests examples
 
 [testenv:mypy]