diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e8a5a9d..fc06472 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -55,7 +55,7 @@ jobs:
     - name: Install and run tests
       working-directory: ${{ github.workspace }}
       run: |
-        python setup.py install
+        pip install .
         cd tests; xvfb-run python test_verify.py -v
 # See https://github.community/t/status-check-for-a-matrix-jobs/127354/7
   all-tests:
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..9fc3b62
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,43 @@
+[build-system]
+requires = ["setuptools >= 61.0"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = "PyForecastTools"
+dynamic = ["version"]
+requires-python = ">=3.6"
+dependencies = [
+  "numpy",
+  "matplotlib",
+#  "spacepy",
+]
+license = "BSD-3-Clause"
+license-files = ["LICENSE.md"]
+readme = "README.md"
+classifiers = ['Development Status :: 4 - Beta',
+               'Intended Audience :: Science/Research',
+               'Topic :: Scientific/Engineering :: Astronomy',
+               'Topic :: Scientific/Engineering :: Atmospheric Science',
+               'Topic :: Scientific/Engineering :: Information Analysis',
+               'Topic :: Scientific/Engineering :: Physics',
+               'Programming Language :: Python :: 3',
+               'Programming Language :: Python :: 3.6',
+               'Programming Language :: Python :: 3.7',
+               '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 :: 3.14',
+               ]
+
+[project.urls]
+homepage = "https://drsteve.github.io/PyForecastTools"
+repository = "https://github.com/drsteve/PyForecastTools"
+
+[tool.setuptools.dynamic]
+version = {attr = "verify.__version__"}
+
+[tool.setuptools.packages.find]
+exclude = ["tests*"]
diff --git a/setup.py b/setup.py
deleted file mode 100644
index e1e1bd8..0000000
--- a/setup.py
+++ /dev/null
@@ -1,35 +0,0 @@
-#!/usr/bin/env python
-
-from setuptools import setup, find_packages
-
-with open("README.md", "r") as fh:
-    long_description = fh.read()
-
-
-setup(name='PyForecastTools',
-      version='1.1.1',
-      description='Model validation and forecast verification tools',
-      author='Steve Morley',
-      author_email='smorley@lanl.gov',
-      license='BSD License',
-      url='https://github.com/drsteve/PyForecastTools',
-      install_requires=['numpy', 'matplotlib'],
-      long_description=long_description,
-      long_description_content_type="text/markdown",
-      packages=find_packages(exclude=['tests']),
-      classifiers=['Development Status :: 4 - Beta',
-                   'License :: OSI Approved :: BSD License',
-                   'Intended Audience :: Science/Research',
-                   'Topic :: Scientific/Engineering :: Astronomy',
-                   'Topic :: Scientific/Engineering :: Atmospheric Science',
-                   'Topic :: Scientific/Engineering :: Information Analysis',
-                   'Topic :: Scientific/Engineering :: Physics',
-                   'Programming Language :: Python :: 3',
-                   'Programming Language :: Python :: 3.6',
-                   'Programming Language :: Python :: 3.7',
-                   'Programming Language :: Python :: 3.8',
-                   'Programming Language :: Python :: 3.9',
-                   'Programming Language :: Python :: 3.10',
-                   ],
-      test_suite='test_verify.py'
-      )
diff --git a/verify/__init__.py b/verify/__init__.py
index 3cf0874..ae3676d 100644
--- a/verify/__init__.py
+++ b/verify/__init__.py
@@ -19,3 +19,5 @@
 from .metrics import *
 from .categorical import *
 from . import plot
+
+__version__ = "1.1.1"