diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..dc5209f
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,7 @@
+[build-system]
+requires = [
+    "setuptools>=46",
+    "wheel",
+    "oldest-supported-numpy",
+]
+build-backend = "setuptools.build_meta"
diff --git a/setup.cfg b/setup.cfg
new file mode 100644
index 0000000..69d78d8
--- /dev/null
+++ b/setup.cfg
@@ -0,0 +1,43 @@
+[metadata]
+name = redmapper
+description = Python implementation of redMaPPer cluster finder
+long_description = file: README.md
+long_description_content_type = text/markdown
+author = Eli Rykoff
+url = https://github.com/erykoff/redmapper
+author_email = erykoff@stanford.edu
+classifiers =
+    Intended Audience :: Science/Research
+    License :: OSI Approved :: Apache Software License
+    Operating System :: POSIX :: Linux
+    Operating System :: MacOS
+    Programming Language :: C
+    Programming Language :: Python :: 3
+    Programming Language :: Python :: 3.7
+    Programming Language :: Python :: 3.8
+    Programming Language :: Python :: 3.9
+    Programming Language :: Python :: 3.10
+
+[options]
+packages = find:
+python_requires = >=3.8
+install_requires =
+  astropy
+  matplotlib
+  pyyaml
+  fitsio
+  esutil
+  numpy
+  scipy
+  healsparse
+  hpgeom
+tests_require =
+  pytest
+zip_safe = True
+
+[options.packages.find]
+exclude =
+  tests
+
+[options.package_data]
+redmapper = data/initcolors/*.fit, data/mstar/*.fit
diff --git a/setup.py b/setup.py
index bbbdb12..ddabc7c 100644
--- a/setup.py
+++ b/setup.py
@@ -1,13 +1,7 @@
-# -*- coding: utf-8 -*-
+from setuptools import setup, Extension
+import numpy
+import os
 
-from setuptools import setup, find_packages, Extension, Command
-import numpy,os,glob
-
-with open('README.md') as f:
-    readme = f.read()
-
-with open('LICENSE') as f:
-    license = f.read()
 
 exec(open('redmapper/_version.py').read())
 
@@ -31,55 +25,30 @@
            'bin/redmapper_weight_randoms.py',
            'bin/redmapper_predict_memory.py']
 
-include_dirs = [numpy.get_include()]
-
-ext_modules=[]
-
-# solver_nfw
-solver_nfw_sources=['redmapper/solver_nfw/solver_nfw_pywrap.c',
-                    'redmapper/solver_nfw/solver_nfw.c',
-                    'redmapper/solver_nfw/nfw_weights.c']
-solver_nfw_module = Extension('redmapper.solver_nfw._solver_nfw_pywrap',
-                              extra_compile_args=['-std=gnu99'],
-                              sources=solver_nfw_sources,
-                              include_dirs=include_dirs)
-ext_modules.append(solver_nfw_module)
-
-# chisq_dist
-chisq_dist_sources=['redmapper/chisq_dist/chisq_dist.c',
-                    'redmapper/chisq_dist/chisq_dist_pywrap.c']
-chisq_dist_module = Extension('redmapper.chisq_dist._chisq_dist_pywrap',
-                              extra_compile_args=['-std=gnu99',os.path.expandvars('-I${GSLI}')],
-                              extra_link_args=[os.path.expandvars('-L${GSLL}')],
-                              libraries=['gsl', 'gslcblas'],
-                              sources=chisq_dist_sources,
-                              include_dirs=include_dirs)
-ext_modules.append(chisq_dist_module)
+solver_nfw_ext = Extension(
+    "redmapper.solver_nfw._solver_nfw_pywrap",
+    extra_compile_args=["-std=gnu99"],
+    sources=[
+        "redmapper/solver_nfw/solver_nfw_pywrap.c",
+        "redmapper/solver_nfw/solver_nfw.c",
+        "redmapper/solver_nfw/nfw_weights.c",
+    ],
+)
 
-class CleanCommand(Command):
-    """Custom clean command to tidy up the project root."""
-    user_options = []
-    def initialize_options(self):
-        pass
-    def finalize_options(self):
-        pass
-    def run(self):
-        os.system('rm -vrf ./build ./dist ./*.pyc ./*.tgz ./*.egg-info')
+chisq_dist_ext = Extension(
+    "redmapper.chisq_dist._chisq_dist_pywrap",
+    extra_compile_args=["-std=gnu99", os.path.expandvars("-I${GSLI}")],
+    extra_link_args=[os.path.expandbars("-L${GSLL}")],
+    libraries=["gsl", "gslcblas"],
+    sources=[
+        "redmapper/chisq_dist/chisq_dist.c",
+        "redmapper/chisq_dist/chisq_dist_pywrap.c",
+    ],
+)
 
 setup(
-    name='redmapper',
+    ext_modules=[solver_nfw_ext, chisq_dist_ext],
+    include_dirs=numpy.get_include(),
     version=__version__,
-    description='Public, Python implementation of redMaPPer',
-    long_description=readme,
-    author='Eli Rykoff, Brett Harvey',
-    author_email='erykoff@slac.stanford.edu, rbharvey@stanford.edu',
-    url='https://github.com/erykoff/redmapper',
-    license=license,
-    ext_modules=ext_modules,
     scripts=scripts,
-    install_requires=['numpy'],
-    packages=find_packages(exclude=('tests', 'docs')),
-    include_package_data=True,
-    cmdclass={'clean': CleanCommand}
 )
-