diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 00000000..4f7081a2
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,28 @@
+name: CI
+
+on:
+  push:
+  pull_request:
+
+jobs:
+  tests:
+    name: Run tests
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        numpy-version: ["oldest-supported-numpy", "numpy"]
+        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11", "3.12"]
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v4
+    - name: Set up Python
+      uses: actions/setup-python@v4
+      with:
+        python-version: ${{ matrix.python-version }}
+    - name: Install Python dependencies
+      run: python -m pip install --prefer-binary setuptools "cython>=0.28,<3.0" "matplotlib>=3,<4" ${{ matrix.numpy-version }}
+    - name: Build and install Raysect
+      run: dev/build.sh
+    - name: Run tests
+      run: dev/test.sh
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index 5f356358..00000000
--- a/.travis.yml
+++ /dev/null
@@ -1,18 +0,0 @@
-language: python
-jobs:
-  include:
-    - python: 3.6
-      env: NUMPY_VERSION=1.15.4
-    - python: 3.7
-      env: NUMPY_VERSION=1.15.4
-    - python: 3.8
-      env: NUMPY_VERSION=1.15.4
-    - python: 3.9
-      env: NUMPY_VERSION=1.19.4
-
-install:
-  - pip install numpy==$NUMPY_VERSION scipy matplotlib>=3 cython>=0.28
-  - dev/build.sh
-
-# command to run tests
-script: dev/test.sh
diff --git a/dev/build_wheels.sh b/dev/build_wheels.sh
deleted file mode 100755
index 0be389ef..00000000
--- a/dev/build_wheels.sh
+++ /dev/null
@@ -1,34 +0,0 @@
-# to be run from within manylinux2010 docker container
-# run the command below from the root of the source folder
-# sudo docker run -ti -v $(pwd):/io quay.io/pypa/manylinux2010_x86_64 /bin/bash
-# in the container run dev/build_wheels.sh
-
-VERSION=0.8.1
-PLAT=manylinux2010_x86_64
-CORES=32
-
-cd /io || exit
-
-# python 3.7
-/opt/python/cp37-cp37m/bin/python -m pip install cython numpy==1.14.6
-/opt/python/cp37-cp37m/bin/python setup.py build_ext -j$CORES
-/opt/python/cp37-cp37m/bin/python setup.py bdist_wheel
-auditwheel repair dist/raysect-$VERSION-cp37-cp37m-linux_x86_64.whl --plat $PLAT
-
-# python 3.8
-/opt/python/cp38-cp38/bin/python -m pip install cython numpy==1.17.5
-/opt/python/cp38-cp38/bin/python setup.py build_ext -j$CORES
-/opt/python/cp38-cp38/bin/python setup.py bdist_wheel
-auditwheel repair dist/raysect-$VERSION-cp38-cp38-linux_x86_64.whl --plat $PLAT
-
-# python 3.9
-/opt/python/cp39-cp39/bin/python -m pip install cython numpy==1.19.5
-/opt/python/cp39-cp39/bin/python setup.py build_ext -j$CORES
-/opt/python/cp39-cp39/bin/python setup.py bdist_wheel
-auditwheel repair dist/raysect-$VERSION-cp39-cp39-linux_x86_64.whl --plat $PLAT
-
-# python 3.10
-/opt/python/cp310-cp310/bin/python -m pip install cython numpy==1.19.5
-/opt/python/cp310-cp310/bin/python setup.py build_ext -j$CORES
-/opt/python/cp310-cp310/bin/python setup.py bdist_wheel
-auditwheel repair dist/raysect-$VERSION-cp310-cp310-linux_x86_64.whl --plat $PLAT
\ No newline at end of file
diff --git a/dev/build_wheels_manylinux2010.sh b/dev/build_wheels_manylinux2010.sh
new file mode 100755
index 00000000..6983156d
--- /dev/null
+++ b/dev/build_wheels_manylinux2010.sh
@@ -0,0 +1,25 @@
+#!/bin/bash
+# To be run from within manylinux2010 docker container.
+# Run the command below from the root of the source folder:
+# sudo docker run -ti -v $(pwd):/io quay.io/pypa/manylinux2010_x86_64 ./dev/build_wheels_manylinux2010.sh
+# Or, to use singularity instead of docker (e.g. on HPC, or where root not available):
+# singularity run -B $(pwd):/io -W /tmp -c docker://quay.io/pypa/manylinux2010_x86_64 /io/dev/build_wheels_manylinux2010.sh
+
+set -e
+cd /io || exit
+VERSION=$(cat raysect/VERSION)
+PLAT=manylinux2010_x86_64
+
+# Numpy provides manylinux2010 wheels only for Python up to 3.9.
+
+# python 3.7
+/opt/python/cp37-cp37m/bin/python -m build .
+auditwheel repair dist/raysect-$VERSION-cp37-cp37m-linux_x86_64.whl --plat $PLAT
+
+# python 3.8
+/opt/python/cp38-cp38/bin/python -m build .
+auditwheel repair dist/raysect-$VERSION-cp38-cp38-linux_x86_64.whl --plat $PLAT
+
+# python 3.9
+/opt/python/cp39-cp39/bin/python -m build .
+auditwheel repair dist/raysect-$VERSION-cp39-cp39-linux_x86_64.whl --plat $PLAT
diff --git a/dev/build_wheels_manylinux2014.sh b/dev/build_wheels_manylinux2014.sh
new file mode 100755
index 00000000..98e6e1a7
--- /dev/null
+++ b/dev/build_wheels_manylinux2014.sh
@@ -0,0 +1,26 @@
+#!/bin/bash
+# To be run from within manylinux2014 docker container.
+# Run the command below from the root of the source folder:
+# sudo docker run -ti -v $(pwd):/io quay.io/pypa/manylinux2014_x86_64 ./dev/build_wheels_manylinux2014.sh
+# Or, to use singularity instead of docker (e.g. on HPC, or where root not available):
+# singularity run -B $(pwd):/io -W /tmp -c docker://quay.io/pypa/manylinux2014_x86_64 /io/dev/build_wheels_manylinux2014.sh
+
+set -e
+cd /io || exit
+VERSION=$(cat raysect/VERSION)
+PLAT=manylinux2014_x86_64
+
+# Numpy provides manylinux2010 wheels for Python up to 3.9. So only need manylinux2014
+# wheels for 3.10 onwards
+
+# python 3.10
+/opt/python/cp310-cp310/bin/python -m build .
+auditwheel repair dist/raysect-$VERSION-cp310-cp310-linux_x86_64.whl --plat $PLAT
+
+# python 3.11
+/opt/python/cp311-cp311/bin/python -m build .
+auditwheel repair dist/raysect-$VERSION-cp311-cp311-linux_x86_64.whl --plat $PLAT
+
+# python 3.12
+/opt/python/cp312-cp312/bin/python -m build .
+auditwheel repair dist/raysect-$VERSION-cp312-cp312-linux_x86_64.whl --plat $PLAT
diff --git a/dev/notes/building_bdist_with_manylinux.txt b/dev/notes/building_bdist_with_manylinux.txt
index 648dceb1..68b83f4c 100644
--- a/dev/notes/building_bdist_with_manylinux.txt
+++ b/dev/notes/building_bdist_with_manylinux.txt
@@ -13,14 +13,29 @@ Start the manylinux docker container (this will download the container, mount th
 This will drop you into the manylinux container terminal. The /opt/python folder in the container holds the various versions of python. This example targets python 3.7. Adjust the paths as appropriate to build bdists for different python versions.
 
     cd io/source
-    /opt/python/cp37-cp37m/bin/python -m pip install cython numpy==1.14.6
-    /opt/python/cp37-cp37m/bin/python setup.py bdist_wheel
+    /opt/python/cp37-cp37m/bin/python -m pip build .
     auditwheel repair dist/raysect-0.8.1-cp37-cp37m-linux_x86_64.whl --plat manylinux2010_x86_64
 
 This will compile the wheel and repair any library references to produce the manylinux wheel files in a folder ./wheelhouse. e.g. raysect-0.8.1-cp37-cp37m-manylinux1_x86_64.whl and raysect-0.8.1-cp37-cp37m-manylinux2010_x86_64.whl.
 
-These can then be uploaded to pypi (just the manylinux2010 packages for now).
+These can then be uploaded to pypi.
 
 For more info see:
  https://realpython.com/python-wheels/#building-a-platform-wheel-macos-and-windows
- https://uwekorn.com/2019/09/15/how-we-build-apache-arrows-manylinux-wheels.html
\ No newline at end of file
+ https://uwekorn.com/2019/09/15/how-we-build-apache-arrows-manylinux-wheels.html
+
+Scripts to semi-automate the wheel building process
+===================================================
+
+There are two scripts which automate this for different versions of Python:
+- dev/build_wheels_manylinux2010.sh builds manylinux2010 wheels for Python 3.7, 3.8 and 3.9
+- dev/build_wheels_manylinux2014.sh builds manylinux2014 wheels for Python 3.10, 3.11 and 3.12
+
+These can be used to produce wheels in a semi-automated fashion:
+1. Install docker as above
+2. Clone the raysect/source repository
+3. Change into the top level of the raysect/source repository.
+4. Run `sudo docker run -ti -v $(pwd):/io quay.io/pypa/manylinux2010_x86_64 /io/dev/build_wheels_manylinux2010.sh`
+5. Run `sudo docker run -ti -v $(pwd):/io quay.io/pypa/manylinux2014_x86_64 /io/dev/build_wheels_manylinux2014.sh`
+6. Upload the wheels in wheelhouse/, and the sdist in dist/, to PyPI using twine.
+
diff --git a/pyproject.toml b/pyproject.toml
index e1fcde71..17d821e2 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,3 +1,3 @@
 [build-system]
-requires = ["setuptools>=42.0", "wheel", "oldest-supported-numpy", "cython>=0.28"]
+requires = ["setuptools>=42.0", "wheel", "oldest-supported-numpy", "cython>=0.28,<3.0"]
 build-backend = "setuptools.build_meta"
diff --git a/raysect/VERSION b/raysect/VERSION
index c18d72be..4978240f 100644
--- a/raysect/VERSION
+++ b/raysect/VERSION
@@ -1 +1 @@
-0.8.1
\ No newline at end of file
+0.8.1.post1
\ No newline at end of file
diff --git a/setup.py b/setup.py
index ed029aa6..a02a8973 100644
--- a/setup.py
+++ b/setup.py
@@ -1,4 +1,5 @@
 from setuptools import setup, find_packages, Extension
+from setuptools.command.build_ext import build_ext as _build_ext
 import sys
 import numpy
 import os
@@ -83,6 +84,14 @@
 with open(path.join(path.dirname(__file__), 'raysect/VERSION')) as version_file:
     version = version_file.read().strip()
 
+# Use multiple processes by default for building extensions
+class build_ext(_build_ext):
+    def finalize_options(self):
+        super().finalize_options()
+        if self.parallel is None:
+            nproc = int(os.getenv("RAYSECT_BUILD_JOBS", str(multiprocessing.cpu_count())))
+            self.parallel = nproc
+
 setup(
     name="raysect",
     version=version,
@@ -104,9 +113,10 @@
         "Topic :: Multimedia :: Graphics :: 3D Rendering",
         "Topic :: Scientific/Engineering :: Physics"
     ],
-    install_requires=['numpy>=0.14', 'matplotlib'],
+    install_requires=['numpy', 'matplotlib'],
     packages=find_packages(),
     include_package_data=True,
-    zip_safe=False,
-    ext_modules=extensions
+    zip_safe= False,
+    ext_modules=extensions,
+    cmdclass={"build_ext": build_ext},
 )