diff --git a/.github/dependabot.yml b/.github/dependabot.yml
new file mode 100644
index 0000000..b701ed3
--- /dev/null
+++ b/.github/dependabot.yml
@@ -0,0 +1,17 @@
+# To get started with Dependabot version updates, you'll need to specify which
+# package ecosystems to update and where the package manifests are located.
+# Please see the documentation for all configuration options:
+# https://docs.github.com/github/administering-a-repository/configuration-options-for-dependency-updates
+
+version: 2
+updates:
+  - package-ecosystem: "github-actions" # See documentation for possible values
+    directory: ".github/workflows" # Location of package manifests
+    schedule:
+      interval: "monthly"
+    groups:
+      actions:
+        patterns:
+          - "*"
+    cooldown:
+      default-days: 7
diff --git a/.github/workflows/publish-to-pypi.yml b/.github/workflows/publish-to-pypi.yml
index b0e8f86..16af96f 100644
--- a/.github/workflows/publish-to-pypi.yml
+++ b/.github/workflows/publish-to-pypi.yml
@@ -1,16 +1,15 @@
-name: Publish to PyPI
+name: build
 
 on:
   release:
-    types: [released]
+    types: [ released ]
+  pull_request:
+  workflow_dispatch:
 
 jobs:
-  publish:
-    uses: spacetelescope/action-publish_to_pypi/.github/workflows/workflow.yml@master
+  build:
+    uses: OpenAstronomy/github-actions-workflows/.github/workflows/publish_pure_python.yml@99401c364fa51c9c507d3cd6d272049278ac0b2c  # v2.4.0
     with:
-      test: false
-      build_platform_wheels: false  # Set to true if your package contains a C extension
+      upload_to_pypi: ${{ (github.event_name == 'release') && (github.event.action == 'released') }}
     secrets:
-      user: ${{ secrets.PYPI_USERNAME_STSCI_MAINTAINER }}
-      password: ${{ secrets.PYPI_PASSWORD_STSCI_MAINTAINER }} # WARNING: Do not hardcode secret values here! If you want to use a different user or password, you can override this secret by creating one with the same name in your Github repository settings.
-      test_password: ${{ secrets.PYPI_PASSWORD_STSCI_MAINTAINER_TEST }}
+      pypi_token: ${{ secrets.PYPI_PASSWORD_STSCI_MAINTAINER }}
diff --git a/.gitignore b/.gitignore
index cb3a762..6edb919 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,3 +6,5 @@ docs/build
 dist
 __pycache__
 pip-wheel-metadata
+version.py
+coverage.xml
diff --git a/README.md b/README.md
index a7ef434..1cb851e 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,7 @@
 # COSTools
 
-[![Build status](https://dev.azure.com/spacetelescope/costools/_apis/build/status/spacetelescope.costools?branchName=master)](https://dev.azure.com/spacetelescope/costools/_build/latest?definitionId=5&branchName=master)
+[![build](https://github.com/spacetelescope/costools/actions/workflows/publish-to-pypi.yml/badge.svg?branch=master)](https://github.com/spacetelescope/costools/actions/workflows/publish-to-pypi.yml)
+[![tests](https://github.com/spacetelescope/costools/actions/workflows/tests.yml/badge.svg?branch=master)](https://github.com/spacetelescope/costools/actions/workflows/tests.yml)
 [![Codecov](https://codecov.io/gh/spacetelescope/costools/branch/master/graph/badge.svg)](https://codecov.io/gh/spacetelescope/costools)
 [![ReadtheDocs](https://readthedocs.org/projects/costools/badge/?version=latest)(http://costools.readthedocs.io/en/latest/)
 [![Powered by Astropy](http://img.shields.io/badge/powered%20by-AstroPy-orange.svg?style=flat)(http://www.astropy.org)
diff --git a/azure-pipelines.yml b/azure-pipelines.yml
deleted file mode 100644
index f66f204..0000000
--- a/azure-pipelines.yml
+++ /dev/null
@@ -1,37 +0,0 @@
-trigger:
-- master
-
-pool:
-  vmImage: 'ubuntu-latest'
-strategy:
-  matrix:
-    Python310:
-      python.version: '3.10'
-    Python311:
-      python.version: '3.11'
-
-steps:
-- task: UsePythonVersion@0
-  inputs:
-    versionSpec: '$(python.version)'
-  displayName: 'Python $(python.version)'
-
-- script: |
-    python -m pip install --upgrade pip
-    pip install -e ".[test]"
-  displayName: 'Install dependencies'
-
-- script: |
-    python -m pip freeze
-  displayName: 'Package listing'
-
-- script: |
-    python -m pip install pytest pytest-azurepipelines
-    pytest --cov=./
-    coverage xml
-    curl -Os https://uploader.codecov.io/latest/linux/codecov
-    chmod +x codecov
-    ./codecov -t "$CODECOV"
-  displayName: 'pytest'
-  env:
-    CODECOV: $(codecov)
diff --git a/pyproject.toml b/pyproject.toml
index 113da5d..c6ec824 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,65 @@
+[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",
+    "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",
+]
+license = "BSD-3-Clause"
+license-files = [
+    "LICENSE.txt"
+]
+readme = "README.md"
+
+[project.optional-dependencies]
+docs = [
+    "sphinx",
+    "numpydoc",
+    "sphinx_rtd_theme>1.2.0",
+]
+test = [
+    "pytest",
+    "pytest-cov",
+]
+
+[project.scripts]
+timefilter = "costools.timefilter:main"
+add_cos_s_region = "costools.add_cos_s_region:call_main"
+
 [build-system]
 requires = [
     "setuptools>=38.2.5",
     "setuptools_scm",
     "wheel",
 ]
+build-backend = "setuptools.build_meta"
+
+[tool.setuptools]
+include-package-data = false
+
+[tool.setuptools.package-data]
+costools = [
+    "pars/*",
+    "*.help",
+]
+
+[tool.setuptools_scm]
+version_file = "src/costools/version.py"
+
diff --git a/setup.py b/setup.py
deleted file mode 100755
index 0f06371..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',
-            'sphinx_rtd_theme>1.2.0',
-        ],
-        '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',
-    ],
-)
diff --git a/costools/__init__.py b/src/costools/__init__.py
similarity index 100%
rename from costools/__init__.py
rename to src/costools/__init__.py
diff --git a/costools/add_cos_s_region.py b/src/costools/add_cos_s_region.py
similarity index 100%
rename from costools/add_cos_s_region.py
rename to src/costools/add_cos_s_region.py
diff --git a/costools/costoolsutil.py b/src/costools/costoolsutil.py
similarity index 100%
rename from costools/costoolsutil.py
rename to src/costools/costoolsutil.py
diff --git a/costools/pars/splittag.cfg b/src/costools/pars/splittag.cfg
similarity index 100%
rename from costools/pars/splittag.cfg
rename to src/costools/pars/splittag.cfg
diff --git a/costools/pars/splittag.cfgspc b/src/costools/pars/splittag.cfgspc
similarity index 100%
rename from costools/pars/splittag.cfgspc
rename to src/costools/pars/splittag.cfgspc
diff --git a/costools/pars/timefilter.cfg b/src/costools/pars/timefilter.cfg
similarity index 100%
rename from costools/pars/timefilter.cfg
rename to src/costools/pars/timefilter.cfg
diff --git a/costools/pars/timefilter.cfgspc b/src/costools/pars/timefilter.cfgspc
similarity index 100%
rename from costools/pars/timefilter.cfgspc
rename to src/costools/pars/timefilter.cfgspc
diff --git a/costools/pars/x1dcorr.cfg b/src/costools/pars/x1dcorr.cfg
similarity index 100%
rename from costools/pars/x1dcorr.cfg
rename to src/costools/pars/x1dcorr.cfg
diff --git a/costools/pars/x1dcorr.cfgspc b/src/costools/pars/x1dcorr.cfgspc
similarity index 100%
rename from costools/pars/x1dcorr.cfgspc
rename to src/costools/pars/x1dcorr.cfgspc
diff --git a/costools/saamodel.py b/src/costools/saamodel.py
similarity index 100%
rename from costools/saamodel.py
rename to src/costools/saamodel.py
diff --git a/costools/splittag.help b/src/costools/splittag.help
similarity index 100%
rename from costools/splittag.help
rename to src/costools/splittag.help
diff --git a/costools/splittag.py b/src/costools/splittag.py
similarity index 100%
rename from costools/splittag.py
rename to src/costools/splittag.py
diff --git a/costools/tests/__init__.py b/src/costools/tests/__init__.py
similarity index 100%
rename from costools/tests/__init__.py
rename to src/costools/tests/__init__.py
diff --git a/costools/tests/test_noop.py b/src/costools/tests/test_noop.py
similarity index 100%
rename from costools/tests/test_noop.py
rename to src/costools/tests/test_noop.py
diff --git a/costools/timefilter.help b/src/costools/timefilter.help
similarity index 100%
rename from costools/timefilter.help
rename to src/costools/timefilter.help
diff --git a/costools/timefilter.py b/src/costools/timefilter.py
similarity index 100%
rename from costools/timefilter.py
rename to src/costools/timefilter.py
diff --git a/costools/x1dcorr.help b/src/costools/x1dcorr.help
similarity index 100%
rename from costools/x1dcorr.help
rename to src/costools/x1dcorr.help
diff --git a/costools/x1dcorr.py b/src/costools/x1dcorr.py
similarity index 100%
rename from costools/x1dcorr.py
rename to src/costools/x1dcorr.py