diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c340d08..7239181 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -25,6 +25,10 @@ jobs:
           python-version: ${{ matrix.python-version }}
           cache: "pip"
 
+      - name: Upgrade setuptools and pip
+        if: matrix.os == 'ubuntu-22.04'
+        run: pip install --upgrade setuptools pip
+
       - name: Install dependencies
         run: pip install .
 
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..42db6c2
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,37 @@
+[build-system]
+requires = ["setuptools"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = "geojsoncontour"
+version = "0.5.0"
+authors = [
+  { name = "Bart Römgens", email = "bart.romgens@gmail.com" },
+]
+license = { file = "LICENSE.md" }
+description = "Convert matplotlib contour plots to geojson"
+readme = "README.md"
+keywords = ["contour", "plot", "geojson", "pyplot", "matplotlib", "gis", "map"]
+requires-python = ">=3.9"
+classifiers = [
+  "Development Status :: 4 - Beta",
+  "Intended Audience :: Developers",
+  "License :: OSI Approved :: MIT License",
+  "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 = [
+  "geojson",
+  "numpy",
+  "matplotlib>=3.8",
+  "xarray",
+]
+[project.urls]
+Repository = "http://github.com/bartromgens/geojsoncontour"
+
+[tool.setuptools]
+packages = ["geojsoncontour", "geojsoncontour.utilities"]
diff --git a/setup.py b/setup.py
deleted file mode 100644
index d472f7d..0000000
--- a/setup.py
+++ /dev/null
@@ -1,38 +0,0 @@
-from setuptools import setup
-
-
-with open("README.md", "r") as fh:
-    long_description = fh.read()
-
-
-setup(
-    name='geojsoncontour',
-    version='0.5.1',
-    description='Convert matplotlib contour plots to geojson',
-    long_description=long_description,
-    long_description_content_type="text/markdown",
-    keywords='contour plot geojson pyplot matplotlib gis map',
-    url='http://github.com/bartromgens/geojsoncontour',
-    author='Bart Römgens',
-    author_email='bart.romgens@gmail.com',
-    license='MIT',
-    packages=['geojsoncontour', 'geojsoncontour.utilities'],
-    install_requires=[
-        'geojson',
-        'numpy',
-        'matplotlib>=3.8',
-        'xarray'
-    ],
-    zip_safe=False,
-    test_suite='tests',
-    classifiers=[
-        'Development Status :: 4 - Beta',
-        'Intended Audience :: Developers',
-        'License :: OSI Approved :: MIT License',
-        'Programming Language :: Python :: 3',
-        'Programming Language :: Python :: 3.4',
-        'Programming Language :: Python :: 3.5',
-        'Programming Language :: Python :: 3.6',
-        'Programming Language :: Python :: 3.7',
-    ],
-)