diff --git a/.coveragerc b/.coveragerc
deleted file mode 100644
index 8166e9d..0000000
--- a/.coveragerc
+++ /dev/null
@@ -1,20 +0,0 @@
-[run]
-cover_pylib = false
-omit =
-  /home/travis/virtualenv/*
-  */site-packages/*
-  */bin/*
-
-[report]
-exclude_lines =
-  pragma: no cover
-  def __repr__
-  except RuntimeError
-  except NotImplementedError
-  except ImportError
-  except FileNotFoundError
-  except CalledProcessError
-  logging.warning
-  logging.error
-  logging.critical
-  if __name__ == .__main__.:
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 8f6c0c7..11aa3d5 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -2,6 +2,8 @@ name: ci
 
 env:
   CMAKE_BUILD_TYPE: Release
+  CMAKE_BUILD_PARALLEL_LEVEL: 4
+  CTEST_PARALLEL_LEVEL: 0
 
 on:
   push:
@@ -11,47 +13,25 @@ on:
 
 jobs:
 
-  linux:
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v2
-    - uses: actions/setup-python@v2
-      with:
-        python-version: '3.x'
-
-    - run: pip install .[tests,lint]
+  core:
+    strategy:
+      matrix:
+        os: [ubuntu-24.04, macos-latest]
 
-    - run: flake8
-    - run: mypy
-
-    - run: pytest
+    runs-on: ${{ matrix.os }}
 
+    env:
+      FC: gfortran-14
 
-  macos:
-    needs: linux
-    runs-on: macos-latest
     steps:
-    - uses: actions/checkout@v2
-    - uses: actions/setup-python@v2
+    - uses: actions/checkout@v4
+    - uses: actions/setup-python@v5
       with:
-        python-version: '3.x'
+        python-version: '3.9'
 
-    - run: pip install .[tests]
-
-    - run: pytest
-      env:
-        FC: gfortran-11
-        CC: gcc-11
-
-  windows:
-    needs: linux
-    runs-on: windows-latest
-    steps:
-    - uses: actions/checkout@v2
-    - uses: actions/setup-python@v2
-      with:
-        python-version: '3.x'
+    - run: pip install .[tests,lint]
 
-    - run: pip install -e .[tests]
+    - run: flake8
+    - run: mypy
 
     - run: pytest
diff --git a/.lgtm.yml b/.lgtm.yml
deleted file mode 100644
index b06edf3..0000000
--- a/.lgtm.yml
+++ /dev/null
@@ -1,4 +0,0 @@
-extraction:
-  python:
-    python_setup:
-      version: 3
diff --git a/.mypy.ini b/.mypy.ini
deleted file mode 100644
index 73e19ab..0000000
--- a/.mypy.ini
+++ /dev/null
@@ -1,11 +0,0 @@
-[mypy]
-files = src/
-ignore_missing_imports = True
-strict_optional = False
-allow_redefinition = True
-show_error_context = False
-show_column_numbers = True
-warn_unreachable = False
-
-[mypy-xarray]
-follow_imports = skip
diff --git a/LICENSE.txt b/LICENSE.txt
index 8673308..896e8df 100644
--- a/LICENSE.txt
+++ b/LICENSE.txt
@@ -1,6 +1,6 @@
 The MIT License (MIT)
 
-Copyright (c) 2015 Michael Hirsch
+Copyright (c) 2015 Scivision, Inc.
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
diff --git a/pyproject.toml b/pyproject.toml
index 90ccf9c..a6c0f9e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,5 +1,41 @@
 [build-system]
-requires = ["setuptools", "wheel"]
+requires = ["setuptools>=61.0.0", "wheel"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = "igrf"
+description = "IGRF13, IGRF12, IGRF11 models with simple object-oriented Python interface."
+keywords = ["geomagnetic", "igrf"]
+classifiers = [
+  "Development Status :: 5 - Production/Stable",
+  "Environment :: Console",
+  "Intended Audience :: Science/Research",
+  "Operating System :: OS Independent",
+  "Programming Language :: Python :: 3",
+  "Programming Language :: Fortran",
+  "Topic :: Scientific/Engineering :: Atmospheric Science"
+]
+dynamic = ["readme", "version"]
+requires-python = ">=3.9"
+dependencies = ["xarray", "numpy"]
+
+[project.scripts]
+findssh = "igrf.__main__:cli"
+
+[project.optional-dependencies]
+tests = ["pytest"]
+lint = ["flake8", "flake8-bugbear", "flake8-builtins", "flake8-blind-except", "mypy"]
+
+[tool.setuptools.dynamic]
+readme = {file = ["README.md"], content-type = "text/markdown"}
+version = {attr = "igrf.__version__"}
 
 [tool.black]
 line-length = 100
+
+[tool.mypy]
+files = "src/"
+ignore_missing_imports = true
+strict_optional = false
+allow_redefinition = true
+warn_unreachable = false
diff --git a/setup.cfg b/setup.cfg
deleted file mode 100644
index 3138c11..0000000
--- a/setup.cfg
+++ /dev/null
@@ -1,53 +0,0 @@
-[metadata]
-name = igrf
-version = 13.0.2
-author = Michael Hirsch, Ph.D.
-author_email = scivision@users.noreply.github.com
-description = IGRF13, IGRF12, IGRF11 models with simple object-oriented Python interface.
-url = https://github.com/space-physics/igrf
-keywords =
-  geomagnetic
-  igrf
-classifiers =
-  Development Status :: 5 - Production/Stable
-  Environment :: Console
-  Intended Audience :: Science/Research
-  Operating System :: OS Independent
-  Programming Language :: Fortran
-  Programming Language :: Python :: 3
-  Topic :: Scientific/Engineering :: Atmospheric Science
-license_files =
-  LICENSE.txt
-long_description = file: README.md
-long_description_content_type = text/markdown
-
-[options]
-python_requires = >= 3.7
-include_package_data = True
-zip_safe = False
-packages = find:
-install_requires =
-  xarray
-  numpy
-package_dir=
-    =src
-
-[options.packages.find]
-where=src
-
-[options.extras_require]
-tests =
-  pytest
-lint =
-  flake8
-  flake8-bugbear
-  flake8-builtins
-  flake8-blind-except
-  mypy
-  types-python-dateutil
-plot =
-  matplotlib
-
-[options.entry_points]
-console_scripts =
-  igrf = igrf.__main__:cli
diff --git a/setup.py b/setup.py
deleted file mode 100644
index d6e6e85..0000000
--- a/setup.py
+++ /dev/null
@@ -1,8 +0,0 @@
-#!/usr/bin/env python3
-import setuptools
-import site
-
-# PEP517 workaround
-site.ENABLE_USER_SITE = True
-
-setuptools.setup()
diff --git a/src/igrf/__init__.py b/src/igrf/__init__.py
index 8619750..e586be0 100644
--- a/src/igrf/__init__.py
+++ b/src/igrf/__init__.py
@@ -1,5 +1,8 @@
 """
 use IGRF via f2py from Python
 """
+
+__version__ = "13.0.2"
+
 from .base import igrf, grid
 from .utils import mag_vector2incl_decl, latlon2colat, latlonworldgrid