diff --git a/.github/workflows/python_tests.yml b/.github/workflows/python_tests.yml
index 7c87b1c3..b2f210f4 100644
--- a/.github/workflows/python_tests.yml
+++ b/.github/workflows/python_tests.yml
@@ -30,13 +30,11 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        pip install -r requirements.txt
-        pip install -r requirements-test.txt
-        pip install .
+        pip install .[test]
 
     - name: Test with pytest
       run: |
-        pytest --cov --cov-report=xml --cov-config=setup.cfg --verbose
+        pytest --cov --cov-report=xml --verbose
 
     - name: Build docs
       if: ${{ matrix.platform == 'ubuntu-latest' && matrix.python-version == 3.9 }}
diff --git a/MANIFEST.in b/MANIFEST.in
index d9af3ce8..75fe1cdc 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -1,36 +1,6 @@
 # Add README, LICENSE and requirements :
 include README.rst
 include LICENSE
-include requirements.txt
 
 # Add datasets .csv files
-include pingouin/datasets/ancova.csv
-include pingouin/datasets/anova.csv
-include pingouin/datasets/anova2.csv
-include pingouin/datasets/anova2_unbalanced.csv
-include pingouin/datasets/anova3.csv
-include pingouin/datasets/anova3_unbalanced.csv
-include pingouin/datasets/blandaltman.csv
-include pingouin/datasets/chi2_independence.csv
-include pingouin/datasets/chi2_mcnemar.csv
-include pingouin/datasets/circular.csv
-include pingouin/datasets/cochran.csv
-include pingouin/datasets/cronbach_alpha.csv
-include pingouin/datasets/cronbach_wide_missing.csv
-include pingouin/datasets/datasets.csv
-include pingouin/datasets/icc.csv
-include pingouin/datasets/mediation.csv
-include pingouin/datasets/mixed_anova.csv
-include pingouin/datasets/mixed_anova_unbalanced.csv
-include pingouin/datasets/multivariate.csv
-include pingouin/datasets/pairwise_corr.csv
-include pingouin/datasets/pairwise_tests.csv
-include pingouin/datasets/pairwise_tests_missing.csv
-include pingouin/datasets/partial_corr.csv
-include pingouin/datasets/penguins.csv
-include pingouin/datasets/rm_anova.csv
-include pingouin/datasets/rm_anova2.csv
-include pingouin/datasets/rm_anova_wide.csv
-include pingouin/datasets/rm_corr.csv
-include pingouin/datasets/rm_missing.csv
-include pingouin/datasets/tips.csv
+recursive-include src/pingouin/datasets *.csv
diff --git a/README.rst b/README.rst
index 1493d8f9..d73f1f91 100644
--- a/README.rst
+++ b/README.rst
@@ -114,6 +114,19 @@ New releases are frequent so always make sure that you have the latest version:
 
   pip install --upgrade pingouin
 
+Development
+-----------
+
+To build and install from source, clone this repository or download the source archive and decompress the files
+
+.. code-block:: shell
+
+  cd pingouin
+  python -m build            # optional, build a wheel and sdist
+  pip install .              # install the package
+  pip install --editable .   # or editable install
+  pytest                     # test the package
+
 Quick start
 ============
 
diff --git a/pyproject.toml b/pyproject.toml
index 67a6d04a..7a2f1782 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,4 +1,121 @@
+[build-system]
+requires = ["setuptools>=61.0", "wheel"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = "pingouin"
+description = "Pingouin: statistical package for Python"
+authors = [
+    {name = "Raphael Vallat", email = "raphaelvallat9@gmail.com"},
+]
+dependencies = [
+    "matplotlib",
+    "numpy",
+    "pandas>=1.5",
+    "pandas_flavor",
+    "scikit-learn>=1.2",
+    "scipy",
+    "seaborn",
+    "statsmodels",
+    "tabulate",
+]
+requires-python = ">=3.8"
+readme = "README.rst"
+license = {text = "GPL-3.0"}
+maintainers = [
+    {name = "Raphael Vallat", email = "raphaelvallat9@gmail.com"},
+]
+dynamic = ["version"]
+classifiers = [
+    "Intended Audience :: Science/Research",
+    "Operating System :: MacOS",
+    "Operating System :: POSIX",
+    "Operating System :: Unix",
+    "Programming Language :: Python :: 3.10",
+    "Programming Language :: Python :: 3.11",
+    "Programming Language :: Python :: 3.8",
+    "Programming Language :: Python :: 3.9",
+    "Topic :: Scientific/Engineering :: Mathematics",
+]
+
+[project.optional-dependencies]
+test = [
+    "pytest>=6",
+    "pytest-cov",
+    "codecov",
+    "openpyxl",
+    "mpmath",
+    # Ensure coverage is new enough for `source_pkgs`.
+    "coverage[toml]>=5.3",
+]
+
+[project.urls]
+Homepage = "https://pingouin-stats.org/index.html"
+Downloads = "https://github.com/raphaelvallat/pingouin/"
+
+[tool.setuptools]
+py-modules = ["pingouin"]
+include-package-data = true
+
+[tool.setuptools.package-data]
+pingouin = [
+    "datasets/*.csv",
+]
+
+[tool.setuptools.packages.find]
+namespaces = false
+where = ["src"]
+
+[tool.setuptools.dynamic]
+version = {attr = "pingouin.__version__"}
+
+[tool.pytest.ini_options]
+minversion = "6.0"
+addopts = "--showlocals --durations=10 --maxfail=2 --cov"
+doctest_optionflags= ["NORMALIZE_WHITESPACE", "IGNORE_EXCEPTION_DETAIL"]
+filterwarnings = [
+    "ignore::UserWarning",
+    "ignore::RuntimeWarning",
+    "ignore::FutureWarning",
+]
+markers = ["slow"]
+
+[tool.coverage.run]
+branch = true
+omit = [
+    "*/setup.py",
+    "*/examples/*",
+    "*/tests/*",
+    "*/datasets/*",
+]
+source_pkgs = ["pingouin"]
+
+[tool.coverage.paths]
+source = ["src"]
+
+[tool.coverage.report]
+show_missing = true
+# sort = "Cover"
+
 [tool.black]
 line-length = 100
 target-version = ['py311']
-include = '\.pyi?$'
\ No newline at end of file
+include = '\.pyi?$'
+
+[tool.flake8]
+# W605 : bug when math equation in numpydoc
+# W503, W504 : line-break with math operator
+# E203: E203 whitespace before ':', not compatible with Black
+# DXXX: Docstring related
+max-line-length = 100
+ignore = ["N806", "N803", "W503", "W504", "W605", "D100", "D200", "D205", "D301", "D400", "D401", "E203"]
+exclude = [
+    ".git",
+    "__pycache__",
+    "docs",
+    "build",
+    "__init__.py",
+    "examples",
+    "setup.py",
+]
+statistics = true
diff --git a/requirements-test.txt b/requirements-test.txt
deleted file mode 100644
index 6c3c87f3..00000000
--- a/requirements-test.txt
+++ /dev/null
@@ -1,6 +0,0 @@
-pytest>=4.6
-codecov
-pytest-cov
-openpyxl
-mpmath
-numpy
diff --git a/requirements.txt b/requirements.txt
deleted file mode 100644
index 3c6373ca..00000000
--- a/requirements.txt
+++ /dev/null
@@ -1,9 +0,0 @@
-numpy
-scipy
-pandas>=1.5
-matplotlib
-seaborn
-statsmodels
-scikit-learn
-pandas_flavor
-tabulate
diff --git a/setup.cfg b/setup.cfg
deleted file mode 100644
index e189609c..00000000
--- a/setup.cfg
+++ /dev/null
@@ -1,47 +0,0 @@
-[aliases]
-test=pytest
-
-[tool:pytest]
-addopts =
-  --showlocals
-  --durations=10
-  --maxfail=2
-  --cov
-# --doctest-modules --doctest-continue-on-failure | do not work with travis
-doctest_optionflags= NORMALIZE_WHITESPACE IGNORE_EXCEPTION_DETAIL
-markers =
-    slow: mark a test as slow.
-filterwarnings =
-    ignore::UserWarning
-    ignore::RuntimeWarning
-    ignore::FutureWarning
-
-[flake8]
-# W605 : bug when math equation in numpydoc
-# W503, W504 : line-break with math operator
-# E203: E203 whitespace before ':', not compatible with Black
-# DXXX: Docstring related
-max-line-length = 100
-ignore = N806, N803, W503, W504, W605, D100, D200, D205, D301, D400, D401, E203
-exclude =
-    .git,
-    __pycache__,
-    docs,
-    build,
-    __init__.py,
-    examples,
-    setup.py,
-statistics=True
-
-[coverage:run]
-branch = True
-source = pingouin
-omit =
-    */setup.py
-    */examples/*
-    */tests/*
-    */datasets/*
-
-[coverage:report]
-show_missing = True
-# sort = Cover
diff --git a/setup.py b/setup.py
deleted file mode 100644
index 563cbc08..00000000
--- a/setup.py
+++ /dev/null
@@ -1,78 +0,0 @@
-#! /usr/bin/env python
-#
-# Copyright (C) 2018 Raphael Vallat
-import os
-
-
-def read(fname):
-    return open(os.path.join(os.path.dirname(__file__), fname)).read()
-
-
-DESCRIPTION = "Pingouin: statistical package for Python"
-LONG_DESCRIPTION = """Pingouin is a statistical Python package based on Pandas.
-"""
-
-DISTNAME = "pingouin"
-MAINTAINER = "Raphael Vallat"
-MAINTAINER_EMAIL = "raphaelvallat9@gmail.com"
-URL = "https://pingouin-stats.org/index.html"
-DOWNLOAD_URL = "https://github.com/raphaelvallat/pingouin/"
-VERSION = "0.5.4"
-LICENSE = "GPL-3.0"
-PACKAGE_DATA = {"pingouin.data.icons": ["*.svg"]}
-
-INSTALL_REQUIRES = [
-    "numpy",
-    "scipy",
-    "pandas>=1.5",
-    "matplotlib",
-    "seaborn",
-    "statsmodels",
-    "scikit-learn",
-    "pandas_flavor",
-    "tabulate",
-]
-
-PACKAGES = [
-    "pingouin",
-    "pingouin.datasets",
-]
-
-CLASSIFIERS = [
-    "Intended Audience :: Science/Research",
-    "Programming Language :: Python :: 3.8",
-    "Programming Language :: Python :: 3.9",
-    "Programming Language :: Python :: 3.10",
-    "Programming Language :: Python :: 3.11",
-    "Topic :: Scientific/Engineering :: Mathematics",
-    "Operating System :: POSIX",
-    "Operating System :: Unix",
-    "Operating System :: MacOS",
-]
-
-try:
-    from setuptools import setup
-
-    _has_setuptools = True
-except ImportError:
-    from distutils.core import setup
-
-if __name__ == "__main__":
-    setup(
-        name=DISTNAME,
-        author=MAINTAINER,
-        author_email=MAINTAINER_EMAIL,
-        maintainer=MAINTAINER,
-        maintainer_email=MAINTAINER_EMAIL,
-        description=DESCRIPTION,
-        long_description=LONG_DESCRIPTION,
-        license=LICENSE,
-        url=URL,
-        version=VERSION,
-        download_url=DOWNLOAD_URL,
-        install_requires=INSTALL_REQUIRES,
-        include_package_data=True,
-        packages=PACKAGES,
-        package_data=PACKAGE_DATA,
-        classifiers=CLASSIFIERS,
-    )
diff --git a/pingouin/__init__.py b/src/pingouin/__init__.py
similarity index 100%
rename from pingouin/__init__.py
rename to src/pingouin/__init__.py
diff --git a/pingouin/bayesian.py b/src/pingouin/bayesian.py
similarity index 100%
rename from pingouin/bayesian.py
rename to src/pingouin/bayesian.py
diff --git a/pingouin/circular.py b/src/pingouin/circular.py
similarity index 100%
rename from pingouin/circular.py
rename to src/pingouin/circular.py
diff --git a/pingouin/config.py b/src/pingouin/config.py
similarity index 100%
rename from pingouin/config.py
rename to src/pingouin/config.py
diff --git a/pingouin/contingency.py b/src/pingouin/contingency.py
similarity index 100%
rename from pingouin/contingency.py
rename to src/pingouin/contingency.py
diff --git a/pingouin/correlation.py b/src/pingouin/correlation.py
similarity index 100%
rename from pingouin/correlation.py
rename to src/pingouin/correlation.py
diff --git a/pingouin/datasets/__init__.py b/src/pingouin/datasets/__init__.py
similarity index 100%
rename from pingouin/datasets/__init__.py
rename to src/pingouin/datasets/__init__.py
diff --git a/pingouin/datasets/ancova.csv b/src/pingouin/datasets/ancova.csv
similarity index 100%
rename from pingouin/datasets/ancova.csv
rename to src/pingouin/datasets/ancova.csv
diff --git a/pingouin/datasets/anova.csv b/src/pingouin/datasets/anova.csv
similarity index 100%
rename from pingouin/datasets/anova.csv
rename to src/pingouin/datasets/anova.csv
diff --git a/pingouin/datasets/anova2.csv b/src/pingouin/datasets/anova2.csv
similarity index 100%
rename from pingouin/datasets/anova2.csv
rename to src/pingouin/datasets/anova2.csv
diff --git a/pingouin/datasets/anova2_unbalanced.csv b/src/pingouin/datasets/anova2_unbalanced.csv
similarity index 100%
rename from pingouin/datasets/anova2_unbalanced.csv
rename to src/pingouin/datasets/anova2_unbalanced.csv
diff --git a/pingouin/datasets/anova3.csv b/src/pingouin/datasets/anova3.csv
similarity index 100%
rename from pingouin/datasets/anova3.csv
rename to src/pingouin/datasets/anova3.csv
diff --git a/pingouin/datasets/anova3_unbalanced.csv b/src/pingouin/datasets/anova3_unbalanced.csv
similarity index 100%
rename from pingouin/datasets/anova3_unbalanced.csv
rename to src/pingouin/datasets/anova3_unbalanced.csv
diff --git a/pingouin/datasets/blandaltman.csv b/src/pingouin/datasets/blandaltman.csv
similarity index 100%
rename from pingouin/datasets/blandaltman.csv
rename to src/pingouin/datasets/blandaltman.csv
diff --git a/pingouin/datasets/chi2_independence.csv b/src/pingouin/datasets/chi2_independence.csv
similarity index 100%
rename from pingouin/datasets/chi2_independence.csv
rename to src/pingouin/datasets/chi2_independence.csv
diff --git a/pingouin/datasets/chi2_mcnemar.csv b/src/pingouin/datasets/chi2_mcnemar.csv
similarity index 100%
rename from pingouin/datasets/chi2_mcnemar.csv
rename to src/pingouin/datasets/chi2_mcnemar.csv
diff --git a/pingouin/datasets/circular.csv b/src/pingouin/datasets/circular.csv
similarity index 100%
rename from pingouin/datasets/circular.csv
rename to src/pingouin/datasets/circular.csv
diff --git a/pingouin/datasets/cochran.csv b/src/pingouin/datasets/cochran.csv
similarity index 100%
rename from pingouin/datasets/cochran.csv
rename to src/pingouin/datasets/cochran.csv
diff --git a/pingouin/datasets/cronbach_alpha.csv b/src/pingouin/datasets/cronbach_alpha.csv
similarity index 100%
rename from pingouin/datasets/cronbach_alpha.csv
rename to src/pingouin/datasets/cronbach_alpha.csv
diff --git a/pingouin/datasets/cronbach_wide_missing.csv b/src/pingouin/datasets/cronbach_wide_missing.csv
similarity index 100%
rename from pingouin/datasets/cronbach_wide_missing.csv
rename to src/pingouin/datasets/cronbach_wide_missing.csv
diff --git a/pingouin/datasets/datasets.csv b/src/pingouin/datasets/datasets.csv
similarity index 100%
rename from pingouin/datasets/datasets.csv
rename to src/pingouin/datasets/datasets.csv
diff --git a/pingouin/datasets/icc.csv b/src/pingouin/datasets/icc.csv
similarity index 100%
rename from pingouin/datasets/icc.csv
rename to src/pingouin/datasets/icc.csv
diff --git a/pingouin/datasets/mediation.csv b/src/pingouin/datasets/mediation.csv
similarity index 100%
rename from pingouin/datasets/mediation.csv
rename to src/pingouin/datasets/mediation.csv
diff --git a/pingouin/datasets/mixed_anova.csv b/src/pingouin/datasets/mixed_anova.csv
similarity index 100%
rename from pingouin/datasets/mixed_anova.csv
rename to src/pingouin/datasets/mixed_anova.csv
diff --git a/pingouin/datasets/mixed_anova_unbalanced.csv b/src/pingouin/datasets/mixed_anova_unbalanced.csv
similarity index 100%
rename from pingouin/datasets/mixed_anova_unbalanced.csv
rename to src/pingouin/datasets/mixed_anova_unbalanced.csv
diff --git a/pingouin/datasets/multivariate.csv b/src/pingouin/datasets/multivariate.csv
similarity index 100%
rename from pingouin/datasets/multivariate.csv
rename to src/pingouin/datasets/multivariate.csv
diff --git a/pingouin/datasets/pairwise_corr.csv b/src/pingouin/datasets/pairwise_corr.csv
similarity index 100%
rename from pingouin/datasets/pairwise_corr.csv
rename to src/pingouin/datasets/pairwise_corr.csv
diff --git a/pingouin/datasets/pairwise_tests.csv b/src/pingouin/datasets/pairwise_tests.csv
similarity index 100%
rename from pingouin/datasets/pairwise_tests.csv
rename to src/pingouin/datasets/pairwise_tests.csv
diff --git a/pingouin/datasets/pairwise_tests_missing.csv b/src/pingouin/datasets/pairwise_tests_missing.csv
similarity index 100%
rename from pingouin/datasets/pairwise_tests_missing.csv
rename to src/pingouin/datasets/pairwise_tests_missing.csv
diff --git a/pingouin/datasets/partial_corr.csv b/src/pingouin/datasets/partial_corr.csv
similarity index 100%
rename from pingouin/datasets/partial_corr.csv
rename to src/pingouin/datasets/partial_corr.csv
diff --git a/pingouin/datasets/penguins.csv b/src/pingouin/datasets/penguins.csv
similarity index 100%
rename from pingouin/datasets/penguins.csv
rename to src/pingouin/datasets/penguins.csv
diff --git a/pingouin/datasets/rm_anova.csv b/src/pingouin/datasets/rm_anova.csv
similarity index 100%
rename from pingouin/datasets/rm_anova.csv
rename to src/pingouin/datasets/rm_anova.csv
diff --git a/pingouin/datasets/rm_anova2.csv b/src/pingouin/datasets/rm_anova2.csv
similarity index 100%
rename from pingouin/datasets/rm_anova2.csv
rename to src/pingouin/datasets/rm_anova2.csv
diff --git a/pingouin/datasets/rm_anova_wide.csv b/src/pingouin/datasets/rm_anova_wide.csv
similarity index 100%
rename from pingouin/datasets/rm_anova_wide.csv
rename to src/pingouin/datasets/rm_anova_wide.csv
diff --git a/pingouin/datasets/rm_corr.csv b/src/pingouin/datasets/rm_corr.csv
similarity index 100%
rename from pingouin/datasets/rm_corr.csv
rename to src/pingouin/datasets/rm_corr.csv
diff --git a/pingouin/datasets/rm_missing.csv b/src/pingouin/datasets/rm_missing.csv
similarity index 100%
rename from pingouin/datasets/rm_missing.csv
rename to src/pingouin/datasets/rm_missing.csv
diff --git a/pingouin/datasets/tips.csv b/src/pingouin/datasets/tips.csv
similarity index 100%
rename from pingouin/datasets/tips.csv
rename to src/pingouin/datasets/tips.csv
diff --git a/pingouin/distribution.py b/src/pingouin/distribution.py
similarity index 100%
rename from pingouin/distribution.py
rename to src/pingouin/distribution.py
diff --git a/pingouin/effsize.py b/src/pingouin/effsize.py
similarity index 100%
rename from pingouin/effsize.py
rename to src/pingouin/effsize.py
diff --git a/pingouin/equivalence.py b/src/pingouin/equivalence.py
similarity index 100%
rename from pingouin/equivalence.py
rename to src/pingouin/equivalence.py
diff --git a/pingouin/multicomp.py b/src/pingouin/multicomp.py
similarity index 100%
rename from pingouin/multicomp.py
rename to src/pingouin/multicomp.py
diff --git a/pingouin/multivariate.py b/src/pingouin/multivariate.py
similarity index 100%
rename from pingouin/multivariate.py
rename to src/pingouin/multivariate.py
diff --git a/pingouin/nonparametric.py b/src/pingouin/nonparametric.py
similarity index 100%
rename from pingouin/nonparametric.py
rename to src/pingouin/nonparametric.py
diff --git a/pingouin/pairwise.py b/src/pingouin/pairwise.py
similarity index 100%
rename from pingouin/pairwise.py
rename to src/pingouin/pairwise.py
diff --git a/pingouin/parametric.py b/src/pingouin/parametric.py
similarity index 100%
rename from pingouin/parametric.py
rename to src/pingouin/parametric.py
diff --git a/pingouin/plotting.py b/src/pingouin/plotting.py
similarity index 100%
rename from pingouin/plotting.py
rename to src/pingouin/plotting.py
diff --git a/pingouin/power.py b/src/pingouin/power.py
similarity index 100%
rename from pingouin/power.py
rename to src/pingouin/power.py
diff --git a/pingouin/regression.py b/src/pingouin/regression.py
similarity index 100%
rename from pingouin/regression.py
rename to src/pingouin/regression.py
diff --git a/pingouin/reliability.py b/src/pingouin/reliability.py
similarity index 100%
rename from pingouin/reliability.py
rename to src/pingouin/reliability.py
diff --git a/pingouin/utils.py b/src/pingouin/utils.py
similarity index 100%
rename from pingouin/utils.py
rename to src/pingouin/utils.py
diff --git a/pingouin/tests/__init__.py b/tests/__init__.py
similarity index 100%
rename from pingouin/tests/__init__.py
rename to tests/__init__.py
diff --git a/pingouin/tests/test_bayesian.py b/tests/test_bayesian.py
similarity index 100%
rename from pingouin/tests/test_bayesian.py
rename to tests/test_bayesian.py
diff --git a/pingouin/tests/test_circular.py b/tests/test_circular.py
similarity index 100%
rename from pingouin/tests/test_circular.py
rename to tests/test_circular.py
diff --git a/pingouin/tests/test_config.py b/tests/test_config.py
similarity index 100%
rename from pingouin/tests/test_config.py
rename to tests/test_config.py
diff --git a/pingouin/tests/test_contingency.py b/tests/test_contingency.py
similarity index 100%
rename from pingouin/tests/test_contingency.py
rename to tests/test_contingency.py
diff --git a/pingouin/tests/test_correlation.R b/tests/test_correlation.R
similarity index 100%
rename from pingouin/tests/test_correlation.R
rename to tests/test_correlation.R
diff --git a/pingouin/tests/test_correlation.py b/tests/test_correlation.py
similarity index 100%
rename from pingouin/tests/test_correlation.py
rename to tests/test_correlation.py
diff --git a/pingouin/tests/test_distribution.py b/tests/test_distribution.py
similarity index 100%
rename from pingouin/tests/test_distribution.py
rename to tests/test_distribution.py
diff --git a/pingouin/tests/test_effsize.py b/tests/test_effsize.py
similarity index 100%
rename from pingouin/tests/test_effsize.py
rename to tests/test_effsize.py
diff --git a/pingouin/tests/test_equivalence.py b/tests/test_equivalence.py
similarity index 100%
rename from pingouin/tests/test_equivalence.py
rename to tests/test_equivalence.py
diff --git a/pingouin/tests/test_multicomp.py b/tests/test_multicomp.py
similarity index 100%
rename from pingouin/tests/test_multicomp.py
rename to tests/test_multicomp.py
diff --git a/pingouin/tests/test_multivariate.py b/tests/test_multivariate.py
similarity index 100%
rename from pingouin/tests/test_multivariate.py
rename to tests/test_multivariate.py
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