diff --git a/pyproject.toml b/pyproject.toml
index 2102b412..b35d2b48 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -313,4 +313,7 @@ docstring-code-format = false
 # enabled.
 docstring-code-line-length = "dynamic"
 
+[tool.setuptools]
+packages = ["cmd2"]
+
 [tool.setuptools_scm]
diff --git a/setup.py b/setup.py
deleted file mode 100755
index 7db19ac1..00000000
--- a/setup.py
+++ /dev/null
@@ -1,117 +0,0 @@
-#!/usr/bin/python
-# coding=utf-8
-"""
-Setuptools setup file, used to install or test 'cmd2'
-"""
-
-import codecs
-
-from setuptools import (
-    setup,
-)
-
-DESCRIPTION = "cmd2 - quickly build feature-rich and user-friendly interactive command line applications in Python"
-
-with codecs.open('README.md', encoding='utf8') as f:
-    LONG_DESCRIPTION = f.read()
-
-CLASSIFIERS = list(
-    filter(
-        None,
-        map(
-            str.strip,
-            """
-Development Status :: 5 - Production/Stable
-Environment :: Console
-Operating System :: OS Independent
-Intended Audience :: Developers
-Intended Audience :: System Administrators
-License :: OSI Approved :: MIT License
-Programming Language :: Python
-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
-Programming Language :: Python :: 3.13
-Programming Language :: Python :: Implementation :: CPython
-Topic :: Software Development :: Libraries :: Python Modules
-""".splitlines(),
-        ),
-    )
-)  # noqa: E128
-
-SETUP_REQUIRES = ['setuptools', 'setuptools_scm']
-
-INSTALL_REQUIRES = [
-    'pyperclip',
-    'wcwidth',
-]
-
-EXTRAS_REQUIRE = {
-    # Windows also requires pyreadline3 to ensure tab completion works
-    ":sys_platform=='win32'": ['pyreadline3'],
-    # Extra dependencies for running unit tests
-    'test': [
-        "gnureadline; sys_platform=='darwin'",  # include gnureadline on macOS to ensure it is available in nox env
-        'codecov',
-        'coverage',
-        'pytest',
-        'pytest-cov',
-        'pytest-mock',
-    ],
-    # development only dependencies:  install with 'pip install -e .[dev]'
-    'dev': [
-        'codecov',
-        'doc8',
-        'invoke',
-        'mypy',
-        'nox',
-        "pytest>=4.6",
-        'pytest-cov',
-        'pytest-mock',
-        'sphinx',
-        'sphinx-rtd-theme',
-        'sphinx-autobuild',
-        'ruff',
-        'twine',
-    ],
-    'docs': [
-        'setuptools',
-        'setuptools_scm',
-        'sphinx',
-        'sphinx-rtd-theme',
-        'sphinx-autobuild',
-    ],
-    'validate': [
-        'mypy',
-        'ruff',
-        'types-setuptools',
-    ],
-}
-
-PACKAGE_DATA = {
-    'cmd2': ['py.typed'],
-}
-
-setup(
-    name="cmd2",
-    use_scm_version={'git_describe_command': 'git describe --dirty --tags --long --exclude plugin-*'},
-    description=DESCRIPTION,
-    long_description=LONG_DESCRIPTION,
-    long_description_content_type='text/markdown',
-    classifiers=CLASSIFIERS,
-    author='Catherine Devlin',
-    author_email='catherine.devlin@gmail.com',
-    url='https://github.com/python-cmd2/cmd2',
-    license='MIT',
-    platforms=['any'],
-    package_data=PACKAGE_DATA,
-    packages=['cmd2'],
-    keywords='command prompt console cmd',
-    python_requires='>=3.8',
-    setup_requires=SETUP_REQUIRES,
-    install_requires=INSTALL_REQUIRES,
-    extras_require=EXTRAS_REQUIRE,
-)