diff --git a/Changelog.rst b/Changelog.rst
index 301219bae..18d7d85ad 100644
--- a/Changelog.rst
+++ b/Changelog.rst
@@ -1,3 +1,13 @@
+Version NEXTRELEASE
+-------------------
+
+**2024-??-??**
+
+* Upgrades to allow cfdm to work with Python 3.12
+  (https://github.com/NCAS-CMS/cfdm/issues/302)
+
+----
+
 Version 1.11.1.0
 ----------------
 
diff --git a/cfdm/data/data.py b/cfdm/data/data.py
index 4f3a935d3..e14f7c6cd 100644
--- a/cfdm/data/data.py
+++ b/cfdm/data/data.py
@@ -395,7 +395,7 @@ def __int__(self):
                 f"Python scalars. Got {self}"
             )
 
-        return int(self.array)
+        return int(self.array[(0,) * self.ndim])
 
     def __iter__(self):
         """Called when an iterator is required.
diff --git a/cfdm/read_write/netcdf/netcdfread.py b/cfdm/read_write/netcdf/netcdfread.py
index fe43e867c..3deed3445 100644
--- a/cfdm/read_write/netcdf/netcdfread.py
+++ b/cfdm/read_write/netcdf/netcdfread.py
@@ -1025,7 +1025,7 @@ def read(
 
         # If the string contains any commas, it is assumed to be a
         # comma-separated list.
-        all_conventions = re.split(",\s*", Conventions)
+        all_conventions = re.split(r",\s*", Conventions)
         if all_conventions[0] == Conventions:
             all_conventions = Conventions.split()
 
diff --git a/cfdm/read_write/netcdf/netcdfwrite.py b/cfdm/read_write/netcdf/netcdfwrite.py
index 81190d6ae..daff32731 100644
--- a/cfdm/read_write/netcdf/netcdfwrite.py
+++ b/cfdm/read_write/netcdf/netcdfwrite.py
@@ -3949,7 +3949,7 @@ def _write_field_or_domain(
         # Ancillary variables
         if field and ancillary_variables:
             ancillary_variables = " ".join(ancillary_variables)
-            ancillary_variables = re.sub("\s+", " ", ancillary_variables)
+            ancillary_variables = re.sub(r"\s+", " ", ancillary_variables)
             logger.info(
                 "    Writing ancillary_variables attribute to "
                 f"netCDF variable {ncvar}: {ancillary_variables!r}"
diff --git a/cfdm/test/test_Data.py b/cfdm/test/test_Data.py
index 639446a2c..13b7fa2f6 100644
--- a/cfdm/test/test_Data.py
+++ b/cfdm/test/test_Data.py
@@ -784,6 +784,15 @@ def test_Data_masked_values(self):
         self.assertTrue(np.isclose(da, a).all())
         self.assertTrue((da.mask == a.mask).all())
 
+    def test_Data__int__(self):
+        """Test Data.__int__."""
+        for x in (1.1, [1.1], [[1.1]]):
+            self.assertEqual(int(cfdm.Data(x)), 1)
+
+        # Can't int on data with size > 1
+        with self.assertRaises(TypeError):
+            int(cfdm.Data([1, 2]))
+
 
 if __name__ == "__main__":
     print("Run date:", datetime.datetime.now())
diff --git a/scripts/cfdump b/scripts/cfdump
index 5ca155c70..df0a5dec7 100755
--- a/scripts/cfdump
+++ b/scripts/cfdump
@@ -11,18 +11,18 @@ if __name__ == "__main__":
     def print_help(version, date):
         import subprocess
 
-        manpage = """\
+        manpage = """
 .TH "CFDUMP" "1" "{0}" "{1}" "cfdump"
 .
 .SH NAME
 .
-cfdump \- view the contents of a CF-netCDF dataset according to the CF data model.
+cfdump - view the contents of a CF-netCDF dataset according to the CF data model.
 .
 .
 .
 .SH SYNOPSIS
 .
-cfdump [\-s] [\-c] [\-e file [\-e file] ...] [\-h] file
+cfdump [-s] [-c] [-e file [-e file] ...] [-h] file
 .
 .
 .
@@ -49,7 +49,7 @@ For versions of the CF conventions up to and including CF-{3}.
 .SH OPTIONS
 .
 .TP
-.B \-c, \-\-complete
+.B -c, --complete
 Display complete descriptions. All properties of all constructs,
 including metadata constructs and their components are described
 without abbreviation with the exception of data arrays which are
@@ -57,24 +57,24 @@ generally abbreviated to their first and last values.
 .
 .
 .TP
-.B \-e file, \-\-external=file
+.B -e file, --external=file
 Read external variables from the given external file. Multiple
 external files may be provided by specifying more than one
 .ft B
-\-e
+-e
 .ft P
 option.
 .
 .
 .TP
-.B \-h, \-\-help
+.B -h, --help
 Display this man page.
 .
 .
 .TP
-.B \-s, \-\-short
+.B -s, --short
 Display short descriptions. Each field construct is described by a
-short, one\-line summary that gives the identity of the field
+short, one-line summary that gives the identity of the field
 construct; the identities and sizes of the dimensions spanned by the
 data array; and the units of the data.
 .
@@ -105,7 +105,7 @@ David Hassell
             [
                 "man",
                 "-r",
-                " Manual page cfdump(1)\ ?ltline\ %lt?L/%L.:",
+                " Manual page cfdump(1) ?ltline %lt?L/%L.:",
                 "-l",
                 "-",
             ],