diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 42c82a78..47180b8d 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -17,7 +17,7 @@ defaults:
 
 jobs:
   build:
-    name: Build ${{ matrix.os }} py${{ matrix.python-version }}
+    name: ${{ matrix.os }} py${{ matrix.python-version }} numpy ${{ matrix.numpy-version  }}
     runs-on: ${{ matrix.os }}
 
     strategy:
@@ -25,6 +25,10 @@ jobs:
       matrix:
         os: ['ubuntu-latest', 'macos-latest', 'windows-latest']
         python-version: ['3.9', '3.10', '3.11', '3.12']
+        numpy-version: ['1.24', '2.0']
+        exclude:
+          - python-version: '3.12'
+            numpy-version: '1.24'
 
     steps:
     - name: Check out python-pdal
@@ -47,6 +51,10 @@ jobs:
         auto-update-conda: true
         environment-file: .github/environment.yml
 
+    - name: Install numpy ${{ matrix.numpy-version }}
+      run: |
+        mamba install -y numpy=${{ matrix.numpy-version }}
+
     - name: Install python-pdal
       run: |
         pip install -vv . --no-deps --no-build-isolation
diff --git a/src/pdal/PyArray.cpp b/src/pdal/PyArray.cpp
index d3521173..55f87b5d 100644
--- a/src/pdal/PyArray.cpp
+++ b/src/pdal/PyArray.cpp
@@ -90,6 +90,10 @@ std::string toString(PyObject *pname)
 } // unnamed namespace
 
 
+#if NPY_ABI_VERSION < 0x02000000
+  #define PyDataType_FIELDS(descr) ((descr)->fields)
+#endif
+
 Array::Array(PyArrayObject* array) : m_array(array), m_rowMajor(true)
 {
     Py_XINCREF(array);
diff --git a/src/pdal/__init__.py b/src/pdal/__init__.py
index 41b36121..a312f568 100644
--- a/src/pdal/__init__.py
+++ b/src/pdal/__init__.py
@@ -1,5 +1,5 @@
 __all__ = ["Pipeline", "Stage", "Reader", "Filter", "Writer", "dimensions", "info"]
-__version__ = '3.4.4'
+__version__ = '3.4.5'
 
 from . import libpdalpython
 from .drivers import inject_pdal_drivers