diff --git a/pyproject.toml b/pyproject.toml
index 113da5d..5ceb0fb 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,67 @@
+[project]
+name = "costools"
+description = "Tools for COS (Cosmic Origins Spectrograph)"
+authors = [
+    { name = "Warren Hack" },
+    { name = "Nadezhda Dencheva" },
+    { name = "Phil Hodge" },
+]
+license-files = ["LICENSE.txt"]
+classifiers = [
+    "Intended Audience :: Science/Research",
+    "License :: OSI Approved :: BSD License",
+    "Operating System :: OS Independent",
+    "Programming Language :: Python",
+    "Topic :: Scientific/Engineering :: Astronomy",
+    "Topic :: Software Development :: Libraries :: Python Modules",
+]
+dependencies = [
+    "astropy",
+    "calcos",
+    "numpy",
+    "stsci.tools",
+]
+dynamic = [
+    "version",
+]
+
+[project.readme]
+file = "README.md"
+content-type = "text/markdown"
+
+[project.scripts]
+timefilter = "costools.timefilter:main"
+add_cos_s_region = "costools.add_cos_s_region:call_main"
+
+[project.optional-dependencies]
+docs = [
+    "sphinx",
+    "numpydoc",
+    "sphinx-rtd-theme",
+]
+test = [
+    "pytest",
+    "pytest-cov",
+]
+
 [build-system]
 requires = [
-    "setuptools>=38.2.5",
+    "setuptools>=61.2",
     "setuptools_scm",
     "wheel",
 ]
+build-backend = "setuptools.build_meta"
+
+[tool.setuptools]
+include-package-data = false
+
+[tool.setuptools.packages.find]
+
+[tool.setuptools.package-data]
+costools = [
+    "pars/*",
+    "*.help",
+]
+
+[tool.setuptools_scm]
+version_file = "costools/version.py"
diff --git a/setup.py b/setup.py
deleted file mode 100755
index 7db4573..0000000
--- a/setup.py
+++ /dev/null
@@ -1,58 +0,0 @@
-#!/usr/bin/env python
-from setuptools import find_packages
-from setuptools import setup
-
-
-PACKAGENAME = 'costools'
-
-setup(
-    name=PACKAGENAME,
-    use_scm_version={'write_to': 'costools/version.py'},
-    setup_requires=['setuptools_scm'],
-    install_requires=[
-        'astropy',
-        'calcos',
-        'numpy',
-        'stsci.tools',
-    ],
-    extras_require={
-        'docs': [
-            'sphinx',
-            'numpydoc',
-        ],
-        'test': [
-            'pytest',
-            'pytest-cov',
-        ],
-    },
-    packages=find_packages(),
-    package_data={
-        PACKAGENAME: [
-            'pars/*',
-            '*.help',
-        ],
-    },
-    entry_points={
-        'console_scripts': [
-            'timefilter = {0}.timefilter:main'.format(PACKAGENAME),
-            'add_cos_s_region = {}.add_cos_s_region:call_main'.format(PACKAGENAME),
-        ],
-    },
-    scripts=[
-        'costools/add_cos_s_region.py',
-    ],
-    author='Warren Hack, Nadezhda Dencheva, Phil Hodge',
-    description='Tools for COS (Cosmic Origins Spectrograph)',
-    long_description='README.md',
-    long_description_content_type='text/x-rst',
-    url='https://github.com/spacetelescope/costools',
-    license='BSD',
-    classifiers=[
-        'Intended Audience :: Science/Research',
-        'License :: OSI Approved :: BSD License',
-        'Operating System :: OS Independent',
-        'Programming Language :: Python',
-        'Topic :: Scientific/Engineering :: Astronomy',
-        'Topic :: Software Development :: Libraries :: Python Modules',
-    ],
-)