diff --git a/.github/dependabot.yml b/.github/dependabot.yml
new file mode 100644
index 0000000..375b7c7
--- /dev/null
+++ b/.github/dependabot.yml
@@ -0,0 +1,10 @@
+version: 2
+updates:
+
+  # Maintain dependencies for GitHub Actions (main)
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    target-branch: "main"
+    schedule:
+      interval: "weekly"
+
diff --git a/.github/workflows/tests_scheduled.yml b/.github/workflows/tests_scheduled.yml
index 6cb81b0..b395bd7 100644
--- a/.github/workflows/tests_scheduled.yml
+++ b/.github/workflows/tests_scheduled.yml
@@ -20,7 +20,7 @@ concurrency:
 
 jobs:
   test:
-    if: (github.repository == 'spacetelescope/costools' && (github.event_name == 'schedule' || github.event_name == 'push' || github.event_name == 'workflow_dispatch' || contains(github.event.pull_request.labels.*.name, 'Weekly CI')))
+    if: (github.repository == 'spacetelescope/costools' && (github.event_name == 'schedule' || github.event_name == 'push' || github.event_name == 'workflow_dispatch' || contains(github.event.pull_request.labels.*.name, 'run devdeps tests')))
     uses: OpenAstronomy/github-actions-workflows/.github/workflows/tox.yml@v1
     with:
       envs: |
diff --git a/.gitignore b/.gitignore
index cb3a762..ae59e40 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,3 +6,4 @@ docs/build
 dist
 __pycache__
 pip-wheel-metadata
+**/version.py
diff --git a/costools/__init__.py b/costools/__init__.py
index d837073..174df7d 100644
--- a/costools/__init__.py
+++ b/costools/__init__.py
@@ -1,12 +1,8 @@
 from __future__ import absolute_import, division         # confidence high
 
-from pkg_resources import get_distribution, DistributionNotFound
-try:
-    __version__ = get_distribution(__name__).version
-except DistributionNotFound:
-    # package is not installed
-    __version__ = 'UNKNOWN'
+from importlib.metadata import version
 
+__version__ = version(__name__)
 
 from . import timefilter
 from . import splittag
@@ -16,4 +12,5 @@
 # upon importing this package.
 import os
 from stsci.tools import teal
+
 teal.print_tasknames(__name__, os.path.dirname(__file__))
diff --git a/pyproject.toml b/pyproject.toml
index 113da5d..d674227 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,71 @@
+[project]
+name = "costools"
+description = "Tools for COS (Cosmic Origins Spectrograph)"
+authors = [
+    { name = "Warren Hack" },
+    { name = "Nadezhda Dencheva" },
+    { name = "Phil Hodge" },
+]
+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>=2.0.0rc1",
+    "stsci.tools",
+]
+dynamic = [
+    "version",
+]
+
+[project.readme]
+file = "README.md"
+content-type = "text/markdown"
+
+[project.license]
+file = "LICENSE.txt"
+content-type = "text/plain"
+
+[project.scripts]
+timefilter = "costools.timefilter:main"
+add_cos_s_region = "costools.add_cos_s_region:call_main"
+
+[project.optional-dependencies]
+docs = [
+    "sphinx",
+    "numpydoc",
+]
+test = [
+    "pytest",
+    "pytest-cov",
+]
+
 [build-system]
 requires = [
     "setuptools>=38.2.5",
     "setuptools_scm",
     "wheel",
+    "numpy>=2.0.0rc1",
+]
+build-backend = "setuptools.build_meta"
+
+[tool.setuptools]
+include-package-data = false
+
+[tool.setuptools.packages.find]
+namespaces = false
+
+[tool.setuptools.package-data]
+costools = [
+    "pars/*",
+    "*.help",
 ]
+
+[tool.setuptools_scm]
+version_file = "costools/version.py"
diff --git a/requirements-dev.txt b/requirements-dev.txt
index 842ffc5..7adb03f 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -3,6 +3,6 @@
 
 # Use Bi-weekly numpy/scipy dev builds
 --extra-index-url https://pypi.anaconda.org/scientific-python-nightly-wheels/simple
-numpy>=0.0.dev0
+numpy>=2.0.0b1
 scipy>=0.0.dev0
 
diff --git a/setup.py b/setup.py
deleted file mode 100755
index 0da78a8..0000000
--- a/setup.py
+++ /dev/null
@@ -1,59 +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',
-    author_email='help@stsci.edu',
-    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',
-    ],
-)