diff --git a/pyproject.toml b/pyproject.toml
index 4112bd1..743a800 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,7 +1,88 @@
+[build-system]
+requires = ["setuptools >= 61.0"]
+
+[project]
+name = "marshmallow_dataclass"
+version = "8.5.14"
+description = "Python library to convert dataclasses into marshmallow schemas."
+readme = "README.md"
+keywords = ["marshmallow", "dataclass", "serialization"]
+license = { text = "MIT" }
+requires-python = ">=3.6"
+
+authors = [
+    { name = "Ophir LOJKINE", email = "pere.jobs@gmail.com" },
+]
+
+classifiers = [
+    "Development Status :: 4 - Beta",
+    "Environment :: Console",
+    "Operating System :: OS Independent",
+    "License :: OSI Approved :: MIT License",
+    "Programming Language :: Python",
+    "Programming Language :: Python :: 3.6",
+    "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 :: Internet :: WWW/HTTP :: Dynamic Content :: CGI Tools/Libraries",
+]
+
+dependencies = [
+    "marshmallow>=3.13.0,<4.0",
+    'dataclasses; python_version == "3.6"',
+    'types-dataclasses<0.6.4; python_version == "3.6"',
+    "typing-inspect>=0.8.0,<1.0",
+    # Need `Literal`
+    "typing-extensions>=3.7.2; python_version < '3.8'",
+    # Need `dataclass_transform(field_specifiers)`
+    # NB: typing-extensions>=4.2.0 conflicts with python 3.6
+    "typing-extensions>=4.2.0; python_version<'3.11' and python_version>='3.7'",
+]
+
+[project.urls]
+Homepage = "https://github.com/lovasoa/marshmallow_dataclass"
+
+[project.optional-dependencies]
+enum = [
+    "marshmallow-enum; python_version < '3.7'",
+    "marshmallow>=3.18.0,<4.0; python_version >= '3.7'",
+]
+union = ["typeguard>=2.4.1,<4.0.0"]
+lint = ["pre-commit~=2.17"]
+docs = ["sphinx"]
+tests = [
+    "pytest>=5.4",
+    # re: pypy: typed-ast (a dependency of mypy) fails to install on pypy
+    # https://github.com/python/typed_ast/issues/111
+    "pytest-mypy-plugins>=1.2.0; implementation_name != 'pypy'",
+]
+dev = [
+    "marshmallow_dataclass[enum]",
+    "marshmallow_dataclass[union]",
+    "marshmallow_dataclass[lint]",
+    "marshmallow_dataclass[docs]",
+    "marshmallow_dataclass[tests]",
+]
+
+[tool.setuptools.package-data]
+marshmallow_dataclass = ["py.typed"]
+
+[tool.setuptools.packages.find]
+namespaces = false
+include = [
+    "marshmallow_dataclass",
+    "marshmallow_dataclass.*",
+]
+
 [tool.black]
 line-length = 88
 target-version = ['py36', 'py37', 'py38', 'py39', 'py310', 'py310']
 
+[tool.mypy]
+ignore_missing_imports = true
+
 [tool.pytest.ini_options]
 filterwarnings = [
     "error:::marshmallow_dataclass|test",
diff --git a/setup.cfg b/setup.cfg
index 1216d89..1d9262e 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,8 +1,6 @@
 [flake8]
+# TODO: move to pyproject.toml after https://github.com/PyCQA/flake8/issues/234
 ignore = E203, E266, E501, W503
 max-line-length = 100
 max-complexity = 18
 select = B,C,E,F,W,T4,B9
-
-[mypy]
-ignore_missing_imports = true
diff --git a/setup.py b/setup.py
deleted file mode 100644
index e23478a..0000000
--- a/setup.py
+++ /dev/null
@@ -1,71 +0,0 @@
-from setuptools import setup, find_packages
-
-VERSION = "8.5.14"
-
-CLASSIFIERS = [
-    "Development Status :: 4 - Beta",
-    "Environment :: Console",
-    "Operating System :: OS Independent",
-    "License :: OSI Approved :: MIT License",
-    "Programming Language :: Python",
-    "Programming Language :: Python :: 3.6",
-    "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 :: Internet :: WWW/HTTP :: Dynamic Content :: CGI Tools/Libraries",
-]
-
-EXTRAS_REQUIRE = {
-    "enum": [
-        "marshmallow-enum; python_version < '3.7'",
-        "marshmallow>=3.18.0,<4.0; python_version >= '3.7'",
-    ],
-    "union": ["typeguard>=2.4.1,<4.0.0"],
-    "lint": ["pre-commit~=2.17"],
-    ':python_version == "3.6"': ["dataclasses", "types-dataclasses<0.6.4"],
-    "docs": ["sphinx"],
-    "tests": [
-        "pytest>=5.4",
-        # re: pypy: typed-ast (a dependency of mypy) fails to install on pypy
-        # https://github.com/python/typed_ast/issues/111
-        "pytest-mypy-plugins>=1.2.0; implementation_name != 'pypy'",
-    ],
-}
-EXTRAS_REQUIRE["dev"] = (
-    EXTRAS_REQUIRE["enum"]
-    + EXTRAS_REQUIRE["union"]
-    + EXTRAS_REQUIRE["lint"]
-    + EXTRAS_REQUIRE["docs"]
-    + EXTRAS_REQUIRE["tests"]
-)
-
-setup(
-    name="marshmallow_dataclass",
-    version=VERSION,
-    description="Python library to convert dataclasses into marshmallow schemas.",
-    long_description=open("README.md").read(),
-    long_description_content_type="text/markdown",
-    packages=find_packages(
-        include=["marshmallow_dataclass", "marshmallow_dataclass.*"]
-    ),
-    author="Ophir LOJKINE",
-    author_email="pere.jobs@gmail.com",
-    url="https://github.com/lovasoa/marshmallow_dataclass",
-    keywords=["marshmallow", "dataclass", "serialization"],
-    classifiers=CLASSIFIERS,
-    license="MIT",
-    python_requires=">=3.6",
-    install_requires=[
-        "marshmallow>=3.13.0,<4.0",
-        "typing-inspect>=0.8.0,<1.0",
-        # Need `Literal`
-        "typing-extensions>=3.7.2; python_version < '3.8'",
-        # Need `dataclass_transform(field_specifiers)`
-        # NB: typing-extensions>=4.2.0 conflicts with python 3.6
-        "typing-extensions>=4.2.0; python_version<'3.11' and python_version>='3.7'",
-    ],
-    extras_require=EXTRAS_REQUIRE,
-    package_data={"marshmallow_dataclass": ["py.typed"]},
-)