diff --git a/.github/workflows/python-versions.yml b/.github/workflows/python-versions.yml
index e179bd2..00ed288 100644
--- a/.github/workflows/python-versions.yml
+++ b/.github/workflows/python-versions.yml
@@ -5,9 +5,9 @@ jobs:
     strategy:
       matrix:
         python-version:
-          - "3.7"
+          - "3.9"
           - "3.13"
-          - "pypy-3.7"
+          - "pypy-3.9"
           - "pypy-3.11"
     runs-on: ubuntu-22.04
     steps:
@@ -28,7 +28,7 @@ jobs:
       - name: Install Python package
         working-directory: git-repo
         run: |
-          python -m pip install .
+          python -m pip install --group test .
       - name: Run tests
         run: |
           python -m sounddevice
diff --git a/.readthedocs.yml b/.readthedocs.yml
index f862743..0ad400a 100644
--- a/.readthedocs.yml
+++ b/.readthedocs.yml
@@ -6,11 +6,9 @@ build:
   jobs:
     post_checkout:
       - git fetch --unshallow || true
-python:
-  install:
-    - method: pip
-      path: .
-    - requirements: doc/requirements.txt
+    install:
+      - pip install --upgrade pip
+      - pip install --group doc .
 sphinx:
   configuration: doc/conf.py
 formats: all
diff --git a/make_dist.sh b/make_dist.sh
index 4c4fe6e..fc8d520 100755
--- a/make_dist.sh
+++ b/make_dist.sh
@@ -8,6 +8,9 @@ PYTHON=python3
 
 make_wheel()
 {
+  # This makes sure that only the appropriate libraries are copied:
+  rm -rf sounddevice.egg-info/
+
   PYTHON_SOUNDDEVICE_PLATFORM=$1 PYTHON_SOUNDDEVICE_ARCHITECTURE=${2:-} \
     $PYTHON -m build
 }
@@ -19,8 +22,5 @@ make_wheel Windows 32bit
 
 make_wheel Windows 64bit
 
-# This makes sure that the libraries are not copied to the final sdist:
-rm -rf sounddevice.egg-info/
-
 # This creates a "pure" wheel:
 make_wheel Linux
diff --git a/pyproject.toml b/pyproject.toml
index 68847bb..650886d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,3 +1,39 @@
 [build-system]
-requires = ["setuptools >= 61.0"]
+requires = ["setuptools", "cffi"]
 build-backend = "setuptools.build_meta"
+
+[project]
+name = "sounddevice"
+license = "MIT"
+dynamic = ["version"]
+description = "Play and Record Sound with Python"
+readme = "README.rst"
+keywords = ["sound", "audio", "PortAudio", "play", "record", "playrec"]
+authors = [{ name = "Matthias Geier", email = "Matthias.Geier@gmail.com" }]
+classifiers = [
+  "Operating System :: OS Independent",
+  "Programming Language :: Python",
+  "Programming Language :: Python :: 3",
+  "Topic :: Multimedia :: Sound/Audio",
+]
+requires-python = ">=3.7"
+dependencies = ["cffi"]
+
+[project.optional-dependencies]
+numpy = ["numpy"]
+
+[dependency-groups]
+dev = [{ include-group = "test" }, { include-group = "doc" }]
+test = []
+doc = [
+  "insipid-sphinx-theme",
+  "sphinx-last-updated-by-git",
+]
+
+[project.urls]
+Documentation = "https://python-sounddevice.readthedocs.io/"
+Repository = "https://github.com/spatialaudio/python-sounddevice/"
+Issues = "https://github.com/spatialaudio/python-sounddevice/issues"
+
+[tool.setuptools.dynamic]
+version = { attr = "sounddevice.__version__" }
diff --git a/setup.py b/setup.py
index 7f9cfb0..08c349a 100644
--- a/setup.py
+++ b/setup.py
@@ -2,13 +2,6 @@
 import platform
 from setuptools import setup
 
-# "import" __version__
-__version__ = 'unknown'
-for line in open('sounddevice.py'):
-    if line.startswith('__version__'):
-        exec(line)
-        break
-
 MACOSX_VERSIONS = '.'.join([
     'macosx_10_6_x86_64',  # for compatibility with pip < v21
     'macosx_10_6_universal2',
@@ -63,34 +56,10 @@ def get_tag(self):
     cmdclass = {'bdist_wheel': bdist_wheel_half_pure}
 
 setup(
-    name='sounddevice',
-    version=__version__,
     py_modules=['sounddevice'],
     packages=packages,
     package_data=package_data,
     zip_safe=zip_safe,
-    python_requires='>=3.7',
-    setup_requires=['CFFI>=1.0'],
-    install_requires=['CFFI>=1.0'],
-    extras_require={'NumPy': ['NumPy']},
     cffi_modules=['sounddevice_build.py:ffibuilder'],
-    author='Matthias Geier',
-    author_email='Matthias.Geier@gmail.com',
-    description='Play and Record Sound with Python',
-    long_description=open('README.rst').read(),
-    license='MIT',
-    keywords='sound audio PortAudio play record playrec'.split(),
-    url='http://python-sounddevice.readthedocs.io/',
-    project_urls={
-        'Source': 'https://github.com/spatialaudio/python-sounddevice',
-    },
-    platforms='any',
-    classifiers=[
-        'License :: OSI Approved :: MIT License',
-        'Operating System :: OS Independent',
-        'Programming Language :: Python',
-        'Programming Language :: Python :: 3',
-        'Topic :: Multimedia :: Sound/Audio',
-    ],
     cmdclass=cmdclass,
 )