diff --git a/.github/workflows/build_wheel.yml b/.github/workflows/build_wheel.yml
index 8c4d5fb..f4b422e 100644
--- a/.github/workflows/build_wheel.yml
+++ b/.github/workflows/build_wheel.yml
@@ -6,7 +6,7 @@ on:
     tags:
       - '*'
 env:
-  CIBW_SKIP: cp27-* cp33-* cp34-* cp35-* pp* *-musllinux*
+  CIBW_SKIP: cp27-* cp33-* cp34-* cp35-* cp36-* cp37-* pp* *-musllinux*
 
 jobs:
   build_wheels:
@@ -14,14 +14,14 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-20.04, windows-2019, macos-latest]
+        os: [ubuntu-latest, windows-2019, macos-latest]
         arch: [auto]
         include:
-          - os: ubuntu-20.04
+          - os: ubuntu-latest
             arch: aarch64
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
 
       - name: Set up QEMU
         if:  ${{ matrix.arch == 'aarch64' }}
@@ -32,8 +32,9 @@ jobs:
         # to supply options, put them in 'env', like:
         env:
           CIBW_ARCHS_LINUX: ${{matrix.arch}}
-          CIBW_BEFORE_BUILD: pip install oldest-supported-numpy
+          CIBW_BEFORE_BUILD: pip install oldest-supported-numpy setuptools wheel cython 
+          CIBW_ARCHS_MACOS: "x86_64 arm64"
 
-      - uses: actions/upload-artifact@v2
+      - uses: actions/upload-artifact@v4
         with:
           path: ./wheelhouse/*.whl
\ No newline at end of file
diff --git a/setup.py b/setup.py
index 15ec417..882612f 100644
--- a/setup.py
+++ b/setup.py
@@ -44,7 +44,7 @@ def read(fname):
       'kimimaro.skeletontricks',
       sources=[ './ext/skeletontricks/skeletontricks.pyx' ],
       language='c++',
-      include_dirs=[ NumpyImport() ],
+      include_dirs=[ str(NumpyImport()) ],
       extra_compile_args=[
         '-std=c++11', '-O3', '-ffast-math'
       ]
diff --git a/tox.ini b/tox.ini
index cceb16d..82d2993 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,9 +1,12 @@
 [tox]
-envlist = py38,py39,py310,py311
+envlist = py38,py39,py310,py311,py312
 
 [testenv]
 platform = darwin
 deps = 
+	setuptools
+	wheel
+	cython
 	-rrequirements.txt
 	oldest-supported-numpy