diff --git a/.github/workflows/python-package.yml b/.github/workflows/python-package.yml
index 4bb9683..64ed8b9 100644
--- a/.github/workflows/python-package.yml
+++ b/.github/workflows/python-package.yml
@@ -16,7 +16,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        python-version: ['3.8', '3.9', '3.10', '3.11']
+        python-version: ['3.9', '3.10', '3.11', '3.12']
         os: [ubuntu-latest, windows-latest, macos-latest]
     steps:
       - uses: actions/checkout@v3
@@ -58,7 +58,7 @@ jobs:
         run: |
           python -m cibuildwheel --output-dir wheelhouse
         env:
-          CIBW_BUILD: cp38-* cp39-* cp310-* cp311-*
+          CIBW_BUILD: cp39-* cp310-* cp311-* cp312-*
           CIBW_SKIP: '*musllinux*'
           CIBW_BEFORE_BUILD: pip install -r requirements.dev.txt
       - uses: actions/upload-artifact@v3
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..0b2f0c5
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,2 @@
+[build-system]
+requires = ["setuptools", "cython", "numpy"]
diff --git a/requirements.dev.txt b/requirements.dev.txt
index 5816f1a..f00586a 100644
--- a/requirements.dev.txt
+++ b/requirements.dev.txt
@@ -1,4 +1,4 @@
-Cython==0.29.33
-numpy==1.24.2
+Cython==3.0.8
+numpy==1.26.4
 pytest==6.2.5
 pytest-benchmark==3.2.3
diff --git a/requirements.txt b/requirements.txt
index c60632f..69bbaa2 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,6 @@
-numpy==1.24.2
-scipy==1.10.1
-h5py==3.8.0
+numpy==1.26.4
+scipy==1.12.0
+h5py==3.10.0
 tqdm==4.41.1
 nutils==4.1
 rhino3dm==7.15.0; (sys_platform == 'windows' and python_version < '3.11') or (sys_platform == 'linux' and python_version < '3.10')
diff --git a/setup.py b/setup.py
index dc535be..7e8f330 100644
--- a/setup.py
+++ b/setup.py
@@ -14,7 +14,7 @@
     long_description_content_type='text/markdown',
     long_description=long_description,
     keywords=['Bspline', 'Splines', 'NURBS', 'Curve', 'Surface', 'Volume', 'Interpolation', 'Approximation', 'Fit', 'Integration', 'Differentiation'],
-    url='https://github.com/sintefmath/Splipy',
+    url='https://github.com/sintef/Splipy',
     maintainer='Kjetil Andre Johannessen',
     maintainer_email='kjetijo@gmail.com',
     license='GNU public license v3',
@@ -41,7 +41,7 @@
     ]),
     # include_dirs=[np.get_include()],
     classifiers=[
-        'Development Status :: 4 - Beta',
+        'Development Status :: 5 - Production/Stable',
         'Topic :: Multimedia :: Graphics :: 3D Modeling',
         'Topic :: Scientific/Engineering :: Mathematics',
         'Intended Audience :: Science/Research',
diff --git a/test.py b/test.py
new file mode 100644
index 0000000..6558ecf
--- /dev/null
+++ b/test.py
@@ -0,0 +1,34 @@
+from __future__ import annotations
+
+from typing import SupportsFloat, Sequence, Protocol, SupportsIndex, Iterator, Any, TypeVar, List, overload, Union
+import numpy as np
+from numpy.typing import ArrayLike
+
+
+# T_co = TypeVar("T_co", covariant=True)
+
+
+# class Seq(Protocol[T_co]):
+#     def __len__(self) -> int: ...
+#     @overload
+#     def __getitem__(self, index: SupportsIndex, /) -> T_co: ...
+#     @overload
+#     def __getitem__(self, index: slice, /) -> Seq[T_co]: ...
+#     def __iter__(self) -> Iterator[T_co]: ...
+#     def __contains__(self, x: Any) -> bool: ...
+#     def __reversed__(self, /) -> Iterator[T_co]: ...
+#     def count(self, value: Any, /) -> int: ...
+#     def index(self, value: Any, /) -> int: ...
+
+
+# b: Seq[SupportsFloat]
+
+# a: ArrayLike = b
+
+f: float
+n: np.floating
+u: Union[float, np.floating]
+
+reveal_type(abs(f))
+reveal_type(abs(n))
+reveal_type(abs(u))