diff --git a/.github/workflows/python.yml b/.github/workflows/python.yml
index cecb92b..811e16c 100644
--- a/.github/workflows/python.yml
+++ b/.github/workflows/python.yml
@@ -28,6 +28,6 @@ jobs:
         pip install -U setuptools
     - name: Run tests
       run: |
-        python setup.py clean --all
-        python setup.py install
-        python -W all setup.py test
+        pip install .[dev]
+        pytest
+        python -m build
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..22ab2c9
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,41 @@
+[build-system]
+requires = ["setuptools>=61.2", "wheel"]
+build-backend = "setuptools.build_meta"
+
+[project]
+version = "3.0.6"
+name = "personnummer"
+description = "Validate Swedish personal identity numbers"
+license = { file = "./LICENSE" }
+authors = [
+    { name = "Personnummer and Contributors", email = "hello@personnummer.dev" },
+]
+
+[project.urls]
+homepage = "https://personnummer.dev"
+repository = "https://github.com/personnummer/python"
+
+[project.entry-points."console_scripts"]
+personnummer = "personnummer.main:main"
+
+[project.optional-dependencies]
+dev = [
+    "pytest",
+    "build",
+]
+
+[options]
+packages = ["personnummer"]
+
+[tool.setuptools]
+include-package-data = false
+
+[tool.setuptools.packages.find]
+exclude = ["tests*"]
+
+[tool.pytest.ini_options]
+pythonpath = "src"
+testpaths = [
+    "tests",
+]
+addopts = "-ra -v"
diff --git a/setup.py b/setup.py
index 84be96a..1abbd06 100644
--- a/setup.py
+++ b/setup.py
@@ -1,17 +1,4 @@
-from setuptools import setup
+import setuptools
 
-setup(
-    name='personnummer',
-    version='3.0.6',
-    description='Validate Swedish personal identity numbers',
-    url='http://github.com/personnummer/python',
-    author='Personnummer and Contributors',
-    author_email='hello@personnummer.dev',
-    license='MIT',
-    packages=['personnummer'],
-    test_suite='pytest',
-    tests_require=['pytest'],
-    entry_points={
-        'console_scripts': ['personnummer = personnummer.main:main']
-    },
-)
+if __name__ == "__main__":
+    setuptools.setup()
diff --git a/personnummer/tests/__init__.py b/tests/__init__.py
similarity index 100%
rename from personnummer/tests/__init__.py
rename to tests/__init__.py
diff --git a/personnummer/tests/test_personnummer.py b/tests/test_personnummer.py
similarity index 100%
rename from personnummer/tests/test_personnummer.py
rename to tests/test_personnummer.py