diff --git a/MANIFEST.in b/MANIFEST.in
index 602fc2f..96737d3 100755
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -1,7 +1 @@
-# C/cython source files
-include jenkspy/src/*
-
-include README.md
-include LICENSE
-include tests/*.*
-include requirements.txt
+graft tests
diff --git a/README.md b/README.md
index 1f0b51e..4191e53 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,7 @@ Compute "natural breaks" (*Fisher-Jenks algorithm*) on list / tuple / array / nu
 
 The algorithm implemented by this library is also sometimes referred to as *Fisher-Jenks algorithm*, *Jenks Optimisation Method* or *Fisher exact optimization method*. This is a deterministic method to calculate the optimal class boundaries.
 
-Intended compatibility: CPython 3.6+
+Intended compatibility: CPython 3.7+
 
 Wheels are provided via PyPI for Windows / MacOS / Linux users - Also available on conda-forge channel for Anaconda users.
 
@@ -86,7 +86,7 @@ pip install jenkspy
 ```shell
 git clone http://github.com/mthh/jenkspy
 cd jenkspy/
-python setup.py install
+pip install .
 ```
 
 - **For anaconda users**
diff --git a/jenkspy/__init__.py b/jenkspy/__init__.py
index 6fe1477..a96367a 100644
--- a/jenkspy/__init__.py
+++ b/jenkspy/__init__.py
@@ -1,6 +1,6 @@
 #!/usr/bin/env python
 # -*- coding: utf-8 -*-
-__version__ = "0.4.0"
+__version__ = "0.4.1"
 
 from .core import jenks_breaks
 from .core import _jenks_matrices
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..69d313c
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,54 @@
+[build-system]
+requires = ["setuptools >= 61.0", "Cython"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = 'jenkspy'
+dynamic = ["version"]
+dependencies = [
+  "numpy"
+]
+requires-python = ">= 3.7"
+authors = [
+  {name = "Matthieu Viry", email = "matthieu.viry@cnrs.fr"},
+]
+maintainers = [
+  {name = "Matthieu Viry", email = "matthieu.viry@cnrs.fr"},
+]
+description = "Compute Natural Breaks (Fisher-Jenks algorithm)"
+readme = "README.md"
+license = {file = "LICENSE"}
+
+classifiers = [
+  "Programming Language :: Python",
+  "Development Status :: 5 - Production/Stable",
+  "Operating System :: OS Independent",
+  "License :: OSI Approved :: MIT License",
+  "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",
+  "Programming Language :: Python :: 3.12",
+  "Topic :: Scientific/Engineering",
+  "Typing :: Typed",
+]
+
+
+[project.urls]
+Homepage = "https://github.com/mthh/jenkspy"
+Repository = "https://github.com/mthh/jenkspy.git"
+Issues = "https://github.com/mthh/jenkspy/issues"
+Changelog = "https://github.com/mthh/jenkspy/blob/master/CHANGES.rst"
+
+[tool.setuptools]
+packages = ["jenkspy"]
+include-package-data = false
+
+
+[tool.setuptools.package-data]
+jenkspy = ["src/*"]
+
+[tool.setuptools.dynamic]
+version = {attr = "jenkspy.__version__"}
+readme = {file = "README.md", content-type = "text/x-rst"}
\ No newline at end of file
diff --git a/requirements.txt b/requirements.txt
deleted file mode 100644
index 296d654..0000000
--- a/requirements.txt
+++ /dev/null
@@ -1 +0,0 @@
-numpy
\ No newline at end of file
diff --git a/setup.py b/setup.py
index 1214b44..4c596d1 100644
--- a/setup.py
+++ b/setup.py
@@ -1,61 +1,19 @@
 # -*- coding: utf-8 -*-
 from distutils.core import setup
 from distutils.extension import Extension
-from ast import parse
-from os import path
 
-from Cython.Distutils import build_ext
 from Cython.Build import cythonize
-
-ext = '.pyx'
+from Cython.Distutils import build_ext
 
 exts = [
     Extension(
         "jenkspy.jenks",
-        ["jenkspy/src/jenks" + ext],
+        ["jenkspy/src/jenks.pyx"],
         ["jenkspy"],
     )
 ]
 
-with open(path.join('jenkspy', '__init__.py')) as f:
-    __version__ = parse(next(filter(lambda line: line.startswith('__version__'),
-                                     f))).body[0].value.s
-
-with open('README.md') as f:
-    long_desc = f.read()
-
-with open('requirements.txt') as f:
-    requirements = f.read().splitlines()
-
 setup(
-    name='jenkspy',
-    version=__version__,
-    license="MIT",
     ext_modules=cythonize(exts),
-    cmdclass={'build_ext': build_ext},
-    packages=["jenkspy"],
-    include_package_data=True,
-    description="Compute Natural Breaks (Fisher-Jenks algorithm)",
-    long_description=long_desc,
-    long_description_content_type='text/x-rst',
-    install_requires=requirements,
-    test_suite="tests",
-    author="Matthieu Viry",
-    author_email="matthieu.viry@cnrs.fr",
-    url='https://github.com/mthh/jenkspy',
-    classifiers=[
-        "Programming Language :: Python",
-        "Development Status :: 5 - Production/Stable",
-        "Operating System :: OS Independent",
-        "License :: OSI Approved :: MIT License",
-        "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",
-        "Programming Language :: Python :: 3.12",
-        "Topic :: Scientific/Engineering",
-        "Typing :: Typed",
-    ],
+    cmdclass={'build_ext': build_ext}
 )