diff --git a/.github/workflows/python-package.yml b/.github/workflows/python-package.yml
index 2108510..aafdab9 100644
--- a/.github/workflows/python-package.yml
+++ b/.github/workflows/python-package.yml
@@ -16,7 +16,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.8","3.9", "3.10", "3.11", "3.12"]
+        python-version: ["3.10", "3.11", "3.12"]
 
     steps:
     - uses: actions/checkout@v4
@@ -25,7 +25,7 @@ jobs:
       with:
         python-version: ${{ matrix.python-version }}
         cache: pip
-    - name: Install requirements
-      run: pip install -r requirements.txt
+    - name: Install tox
+      run: pip install tox
     - name: Run tox
       run: tox -e py
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..4ffaa43
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,39 @@
+[project]
+name = "puzpy"
+description = "python crossword puzzle library"
+readme = { file = "README.rst", content-type = "text/x-rst" }
+license = { file = "LICENSE" }
+version = "0.2.6"
+keywords = [ "puz", "crosswords", "crossword", "puzzle", "acrosslite", "xword", "xwords" ]
+classifiers = [
+    "Development Status :: 5 - Production/Stable",
+    "Intended Audience :: Developers",
+    "License :: OSI Approved :: MIT License",
+    "Operating System :: OS Independent",
+    "Programming Language :: Python :: 2",
+    "Programming Language :: Python :: 2.7",
+    "Programming Language :: Python :: 3",
+    "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 :: Games/Entertainment :: Puzzle Games",
+]
+authors = [
+    { name = "Alex Dejarnatt", email = "adejarnatt@gmail.com" },
+]
+maintainers = [
+    { name = "Simeon Visser", email = "simeonvisser@gmail.com" },
+]
+
+
+[project.urls]
+Repository = "https://github.com/alexdej/puzpy.git"
+Issues = "https://github.com/alexdej/puzpy/issues"
+
+
+[build-system]
+requires = ["setuptools >= 61.0"]
+build-backend = "setuptools.build_meta"
+
diff --git a/requirements.txt b/requirements.txt
deleted file mode 100644
index 02cff76..0000000
--- a/requirements.txt
+++ /dev/null
@@ -1,2 +0,0 @@
-tox
-flake8
\ No newline at end of file
diff --git a/setup.cfg b/setup.cfg
deleted file mode 100644
index 5e40900..0000000
--- a/setup.cfg
+++ /dev/null
@@ -1,2 +0,0 @@
-[wheel]
-universal = 1
diff --git a/setup.py b/setup.py
deleted file mode 100644
index 1da7f72..0000000
--- a/setup.py
+++ /dev/null
@@ -1,34 +0,0 @@
-#!/usr/bin/env python
-from setuptools import setup
-
-setup(
-    name='puzpy',
-    version='0.2.6',
-    description='python crossword puzzle library',
-    long_description=open('README.rst').read(),
-    long_description_content_type='text/x-rst',
-    author='Alex Dejarnatt',
-    author_email='adejarnatt@gmail.com',
-    maintainer='Simeon Visser',
-    maintainer_email='simeonvisser@gmail.com',
-    url='https://github.com/alexdej/puzpy',
-    download_url='https://pypi.python.org/pypi/puzpy',
-    py_modules=['puz'],
-    install_requires=[],
-    classifiers=[
-        'Development Status :: 5 - Production/Stable',
-        'Intended Audience :: Developers',
-        'License :: OSI Approved :: MIT License',
-        'Operating System :: OS Independent',
-        'Programming Language :: Python :: 2',
-        'Programming Language :: Python :: 2.7',
-        'Programming Language :: Python :: 3',
-        '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 :: Games/Entertainment :: Puzzle Games',
-    ],
-    keywords='puz crosswords crossword puzzle acrosslite xword xwords'
-)
diff --git a/tox.ini b/tox.ini
index 99188d4..a85250b 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,14 +1,23 @@
 [tox]
-envlist =  py27, py38, py39, py310, py311, py312
-requires = virtualenv<20.22.0
+requires = 
+    tox>=4
+
+envlist =  lint, py{310,311,312}, coverage
 
 [testenv]
-commands = 
+description = run unit tests
+commands =
     python tests.py
+
+[testenv:lint]
+description = run flake8 on source code
+commands = 
     flake8 . --count --show-source --max-line-length=127 --statistics
 deps = flake8
+skip_install = true
 
-[testenv:py36]
+[testenv:coverage]
+description = generate coverage report for unit tests
 commands =
     coverage run tests.py
     coverage html