diff --git a/.ci b/.ci
index 899b183..4e4f33e 160000
--- a/.ci
+++ b/.ci
@@ -1 +1 @@
-Subproject commit 899b18336b4ce3bd9328fd30c33621224c78a4d7
+Subproject commit 4e4f33e54f59343c77342200a95800073661e7ac
diff --git a/.github/workflows/ci-scripts-build.yml b/.github/workflows/ci-scripts-build.yml
index 6729366..c46ce43 100644
--- a/.github/workflows/ci-scripts-build.yml
+++ b/.github/workflows/ci-scripts-build.yml
@@ -11,8 +11,9 @@ env:
 
 jobs:
   build-base:
-    name: ${{ matrix.base }}/${{ matrix.os }}/${{ matrix.python }}/${{ matrix.extra }}
+    name: ${{ matrix.base }}/${{ matrix.os }}/${{ matrix.profile }}/${{ matrix.python }}/${{ matrix.extra }}
     runs-on: ${{ matrix.os }}
+    container: ${{ matrix.container }}
     # Set environment variables from matrix parameters
     env:
       CMP: ${{ matrix.cmp }}
@@ -33,6 +34,49 @@ jobs:
             base: "7.0"
             python: "3.7"
             profile: deb10
+            container: "python:3.7"
+            test: yes
+
+          - os: ubuntu-latest
+            cmp: gcc
+            configuration: default
+            base: "7.0"
+            python: "3.9"
+            profile: deb11
+            test: yes
+
+          - os: ubuntu-latest
+            cmp: gcc
+            configuration: default
+            base: "7.0"
+            python: "3.11"
+            profile: deb12
+            test: yes
+
+          - os: ubuntu-latest
+            cmp: gcc
+            configuration: default
+            base: "7.0"
+            python: "3.13"
+            profile: deb13
+            test: yes
+
+          - os: ubuntu-latest
+            cmp: gcc
+            configuration: default
+            base: "7.0"
+            python: "3.6"
+            container: "python:3.6"
+            profile: latest
+            test: yes
+
+          - os: ubuntu-latest
+            cmp: gcc
+            configuration: default
+            base: "7.0"
+            python: "3.7"
+            container: "python:3.7"
+            profile: latest
             test: yes
 
           - os: ubuntu-latest
@@ -59,6 +103,30 @@ jobs:
             profile: latest
             test: yes
 
+          - os: ubuntu-latest
+            cmp: gcc
+            configuration: default
+            base: "7.0"
+            python: "3.11"
+            profile: latest
+            test: yes
+
+          - os: ubuntu-latest
+            cmp: gcc
+            configuration: default
+            base: "7.0"
+            python: "3.12"
+            profile: latest
+            test: yes
+
+          - os: ubuntu-latest
+            cmp: gcc
+            configuration: default
+            base: "7.0"
+            python: "3.13"
+            profile: latest
+            test: yes
+
           - os: macos-latest
             cmp: gcc
             configuration: default
@@ -72,20 +140,31 @@ jobs:
             configuration: default
             base: "3.15"
             python: "3.7"
+            container: "python:3.7"
             profile: deb10
             test: yes
 
+          - os: ubuntu-latest
+            cmp: gcc
+            configuration: default
+            base: "3.15"
+            python: "3.13"
+            profile: deb13
+            test: yes
+
           - os: ubuntu-latest
             cmp: gcc
             configuration: default
             base: "3.14"
             python: "3.7"
+            container: "python:3.7"
             profile: deb10
     steps:
     - uses: actions/checkout@v3
       with:
         submodules: true
     - name: Set up Python ${{ matrix.python }}
+      if: ${{ !matrix.container }}
       uses: actions/setup-python@v4
       with:
         python-version: ${{ matrix.python }}
diff --git a/devsupApp/src/dbapi.c b/devsupApp/src/dbapi.c
index f859cd6..ccbc69c 100644
--- a/devsupApp/src/dbapi.c
+++ b/devsupApp/src/dbapi.c
@@ -289,11 +289,11 @@ static struct PyMethodDef dbapimethod[] = {
 
 #if PY_MAJOR_VERSION >= 3
 static struct PyModuleDef dbapimodule = {
-  PyModuleDef_HEAD_INIT,
+    PyModuleDef_HEAD_INIT,
     "devsup._dbapi",
     NULL,
     -1,
-    &dbapimethod
+    dbapimethod
 };
 #endif
 
diff --git a/devsupApp/src/dbfield.c b/devsupApp/src/dbfield.c
index 4a03cba..94da410 100644
--- a/devsupApp/src/dbfield.c
+++ b/devsupApp/src/dbfield.c
@@ -40,6 +40,10 @@ static const int dbf2np_map[DBF_MENU+1] = {
     NPY_INT16,   // DBF_MENU
 };
 static PyArray_Descr* dbf2np[DBF_MENU+1];
+#if NPY_ABI_VERSION < 0x02000000
+  #define PyDataType_ELSIZE(descr) ((descr)->elsize)
+  #define PyDataType_SET_ELSIZE(descr, size) (descr)->elsize = size
+#endif
 #endif
 
 typedef struct {
@@ -98,10 +102,10 @@ static PyObject* build_array(PyObject* obj, void *data, unsigned short ftype, un
 
     desc = dbf2np[ftype];
     if(ftype==DBF_STRING) {
-        desc->elsize = MAX_STRING_SIZE;
+        PyDataType_SET_ELSIZE(desc, MAX_STRING_SIZE);
     }
 
-    Py_XINCREF(desc);
+    Py_XINCREF(desc); // take a reference for PyArray_NewFromDescr() to steal
     return PyArray_NewFromDescr(&PyArray_Type, desc, ndims, dims, NULL, data, flags, (PyObject*)obj);
 #else
     PyErr_SetNone(PyExc_NotImplementedError);
@@ -115,22 +119,25 @@ static int assign_array(DBADDR *paddr, PyObject *arr)
     void *rawfield = paddr->pfield;
     rset *prset;
     PyObject *aval;
+    PyArrayObject *array = (PyArrayObject *)arr;
     unsigned elemsize = dbValueSize(paddr->field_type);
     unsigned long maxlen = paddr->no_elements, insize;
     PyArray_Descr *desc = dbf2np[paddr->field_type];
 
     if(paddr->field_type==DBF_STRING &&
-        (PyArray_NDIM(arr)!=2 || PyArray_DIM(arr,0)>maxlen || PyArray_DIM(arr,1)!=MAX_STRING_SIZE))
+        (PyArray_NDIM(array) != 2 ||
+         PyArray_DIM(array, 0) > (npy_intp) maxlen ||
+         PyArray_DIM(array, 1) != MAX_STRING_SIZE))
     {
         PyErr_Format(PyExc_ValueError, "String array has incorrect shape or is too large");
         return 1;
 
-    } else if(PyArray_NDIM(arr)!=1 || PyArray_DIM(arr,0)>maxlen) {
+    } else if(PyArray_NDIM(array) != 1 || PyArray_DIM(array, 0) > (npy_intp) maxlen) {
         PyErr_Format(PyExc_ValueError, "Array has incorrect shape or is too large");
         return 1;
     }
 
-    insize = PyArray_DIM(arr, 0);
+    insize = PyArray_DIM(array, 0);
 
     if(paddr->special==SPC_DBADDR &&
        (prset=dbGetRset(paddr)) &&
@@ -152,16 +159,17 @@ static int assign_array(DBADDR *paddr, PyObject *arr)
     }
 
     Py_XINCREF(desc);
-    if(!(aval = PyArray_FromAny(arr, desc, 1, 2, NPY_CARRAY, arr)))
+    if(!(aval = PyArray_FromAny(arr, desc, 1, 2, NPY_ARRAY_C_CONTIGUOUS | NPY_ARRAY_ALIGNED | NPY_ARRAY_WRITEABLE, arr)))
         return 1;
 
-    if(elemsize!=PyArray_ITEMSIZE(aval)) {
+    if(elemsize!=PyArray_ITEMSIZE((PyArrayObject *)aval)) {
         PyErr_Format(PyExc_AssertionError, "item size mismatch %u %u",
-                    elemsize, (unsigned)PyArray_ITEMSIZE(aval) );
+                     elemsize, (unsigned)PyArray_ITEMSIZE((PyArrayObject *)aval));
+        Py_DECREF(aval);
         return 1;
     }
 
-    memcpy(rawfield, PyArray_GETPTR1(aval, 0), insize*elemsize);
+    memcpy(rawfield, PyArray_GETPTR1((PyArrayObject *)aval, 0), insize*elemsize);
 
     Py_DECREF(aval);
 
@@ -207,7 +215,7 @@ static PyObject* pyField_getval(pyField *self)
 
         if(self->addr.no_elements>1) {
             return build_array((PyObject*)self, rawfield, self->addr.field_type,
-                               noe, NPY_CARRAY_RO);
+                               noe, NPY_ARRAY_C_CONTIGUOUS | NPY_ARRAY_ALIGNED);
         }
     }
 
@@ -362,7 +370,7 @@ static PyObject *pyField_getarray(pyField *self)
     } else
         data = self->addr.pfield;
 
-    return build_array((PyObject*)self, data, self->addr.field_type, self->addr.no_elements, NPY_CARRAY);
+    return build_array((PyObject*)self, data, self->addr.field_type, self->addr.no_elements, NPY_ARRAY_C_CONTIGUOUS | NPY_ARRAY_ALIGNED | NPY_ARRAY_WRITEABLE);
 }
 
 static PyObject *pyField_getlen(pyField *self)
diff --git a/documentation/environment.rst b/documentation/environment.rst
index a33677b..076d7cb 100644
--- a/documentation/environment.rst
+++ b/documentation/environment.rst
@@ -4,7 +4,7 @@ Runtime Environment
 The pyDevSup module initializes the interpreter during the registration
 phase of IOC startup with the *pySetupReg* registrar function. ::
 
-  #!../../bin/linux-x86_64/softIocPy2.7
+  #!../../bin/linux-x86_64/softIocPy3.6
   # Interpreter not started
   dbLoadDatabase("../../dbd/softIocPy.dbd",0,0)
   softIocPy_registerRecordDeviceDriver(pdbbase)
@@ -51,7 +51,7 @@ file. ::
 
 The default or preferred Python version can be specificed in *configure/CONFIG_SITE* ::
 
-  PY_VER ?= 2.7
+  PY_VER ?= 3.6
 
 The following should be added to individual EPICS Makefiles. ::
 
@@ -64,8 +64,8 @@ The following should be added to individual EPICS Makefiles. ::
 
 This will add or amend several make variables.  The ``USR_*FLAGS`` variables
 may be extended with appropriate flags for building python modules.  The ``PY_VER``
-variable is defined with the Python version number found in install directories (eg "2.7").
-The ``PY_LD_VER`` variable is defined with the python library version number (eg "3.2mu"),
+variable is defined with the Python version number found in install directories (eg "3.6").
+The ``PY_LD_VER`` variable is defined with the python library version number (eg "3.6mu"),
 which may be the same as ``PY_VER``.
 
 Include pyDevSup in your IOC
@@ -113,11 +113,11 @@ Installing for several Python versions
 The recipe for building and installing the pyDevSup module
 for several python version side by side is ::
 
-  make PY_VER=2.6
+  make PY_VER=3.6
   make clean
-  make PY_VER=2.7
+  make PY_VER=3.10
   make clean
-  make PY_VER=3.2
+  make PY_VER=3.14
   make clean
 
 The ``PYTHON`` make variable can be specified if the interpreter executable
diff --git a/documentation/gettingstarted.rst b/documentation/gettingstarted.rst
index ef542ef..294494a 100644
--- a/documentation/gettingstarted.rst
+++ b/documentation/gettingstarted.rst
@@ -24,7 +24,7 @@ The :py:meth:`process <DeviceSupport.process>` method increments the *VAL* field
 
 Start this IOC with. ::
 
-  $ ./bin/linux-x86_64/softIocPy2.7 -d cntrec.db
+  $ ./bin/linux-x86_64/softIocPy3.6 -d cntrec.db
   Starting iocInit
   ...
   iocRun: All initialization complete
diff --git a/documentation/index.rst b/documentation/index.rst
index 2acf7b1..e3a86d1 100644
--- a/documentation/index.rst
+++ b/documentation/index.rst
@@ -8,7 +8,7 @@ pydevsup documentation
 
 *pyDevSup* is a means of writing EPICS device support code in Python.
 
-It currently supports EPICS >=3.14.12 and python versions: 2.7, and >=3.2.
+It currently supports EPICS >=3.14.12 and python versions >=3.6
 The numpy package is also required.
 
 The source can be found at http://github.com/mdavidsaver/pyDevSup
diff --git a/iocBoot/iocapplmon/st.cmd b/iocBoot/iocapplmon/st.cmd
index c931fb9..142d051 100755
--- a/iocBoot/iocapplmon/st.cmd
+++ b/iocBoot/iocapplmon/st.cmd
@@ -1,4 +1,4 @@
-#!../../bin/linux-x86/softIocPy2.7
+#!../../bin/linux-x86/softIocPy3.6
 
 < envPaths
 
diff --git a/iocBoot/iocarchivemon/st.cmd b/iocBoot/iocarchivemon/st.cmd
index 20fef52..be83af7 100755
--- a/iocBoot/iocarchivemon/st.cmd
+++ b/iocBoot/iocarchivemon/st.cmd
@@ -1,4 +1,4 @@
-#!../../bin/linux-x86/softIocPy2.7
+#!../../bin/linux-x86/softIocPy3.6
 
 < envPaths
 
diff --git a/iocBoot/iocarchivemon/st.cmd.main b/iocBoot/iocarchivemon/st.cmd.main
index df00b9c..ea10a94 100755
--- a/iocBoot/iocarchivemon/st.cmd.main
+++ b/iocBoot/iocarchivemon/st.cmd.main
@@ -1,4 +1,4 @@
-#!../../bin/linux-x86_64/softIocPy2.7
+#!../../bin/linux-x86_64/softIocPy3.6
 
 < envPaths
 
diff --git a/makehelper.py b/makehelper.py
index ef36d63..05fd147 100644
--- a/makehelper.py
+++ b/makehelper.py
@@ -26,15 +26,30 @@
         pass
     out = open(sys.argv[1], 'w')
 
-from distutils.sysconfig import get_config_var, get_python_inc
+"""
+3.2      sysconfig
+3.10     sysconfig.get_path
+3.10.13  distutils is deprecated.
+3.12     distutils was removed.
+"""
+if sys.version_info >= (3,10,):
+    from sysconfig import get_config_var, get_path
+    incdirs = [get_path("include")]
+else:
+    from distutils.sysconfig import get_config_var, get_python_inc
+    incdirs = [get_python_inc()]
 
-incdirs = [get_python_inc()]
 libdir = get_config_var('LIBDIR') or ''
 
 have_np='NO'
+
+"""
+numpy 1.18, numpy.get_include()
+"""
 try:
-    from numpy.distutils.misc_util import get_numpy_include_dirs
-    incdirs = get_numpy_include_dirs()+incdirs
+    from numpy import get_include
+    numpy_dir = [get_include()]
+    incdirs = numpy_dir+incdirs
     have_np='YES'
 except ImportError:
     pass
diff --git a/requirements-deb11.txt b/requirements-deb11.txt
new file mode 100644
index 0000000..bc9b6d9
--- /dev/null
+++ b/requirements-deb11.txt
@@ -0,0 +1,2 @@
+numpy==1.19.5
+nose2==0.9.2
diff --git a/requirements-deb12.txt b/requirements-deb12.txt
new file mode 100644
index 0000000..13118a8
--- /dev/null
+++ b/requirements-deb12.txt
@@ -0,0 +1,2 @@
+numpy==1.24.2
+nose2==0.12.0
diff --git a/requirements-deb13.txt b/requirements-deb13.txt
new file mode 100644
index 0000000..abb51c7
--- /dev/null
+++ b/requirements-deb13.txt
@@ -0,0 +1,2 @@
+numpy==2.2.4
+nose2==0.15.1