diff --git a/.github/workflows/python-package.yml b/.github/workflows/python-package.yml
index 75912506d..fa3b768d0 100644
--- a/.github/workflows/python-package.yml
+++ b/.github/workflows/python-package.yml
@@ -93,7 +93,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, windows-latest, macos-14, macos-latest]
-        python-version: ["3.9", "3.10", "3.11", "3.12"]
+        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
         include:
           - { os: ubuntu-latest, shell: bash }
           - { os: macos-latest, shell: bash }
@@ -179,7 +179,7 @@ jobs:
             macos-14,
             macos-latest,
           ]
-        python-build: ["cp39", "cp310", "cp311", "cp312"]
+        python-build: ["cp39", "cp310", "cp311", "cp312", "cp313"]
         #exclude:
         #   none currently
         #   - { os: macos-latest, python-build: 'cp37' }
diff --git a/docs/conf.py b/docs/conf.py
index a6fd5afbe..be34d0cdc 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -44,7 +44,6 @@
 # https://www.sphinx-doc.org/en/master/usage/configuration.html#options-for-html-output
 
 html_theme = "sphinx_rtd_theme"
-html_theme_path = [sphinx_rtd_theme.get_html_theme_path()]
 
 htmlhelp_basename = f'{project.lower()}doc'
 
diff --git a/docs/requirements.txt b/docs/requirements.txt
index b7ee962d5..f3d8c4a44 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,4 +1,4 @@
-sphinx==5.3.0
+sphinx==7.3.7
 readthedocs-sphinx-ext==2.1.9 # ??
 sphinx-rtd-theme
-myst-parser==0.18.1
+myst-parser==3.0.1
diff --git a/docs/tutorials/otio-serialized-schema.md b/docs/tutorials/otio-serialized-schema.md
index 1b9dcd0b8..73919a094 100644
--- a/docs/tutorials/otio-serialized-schema.md
+++ b/docs/tutorials/otio-serialized-schema.md
@@ -29,24 +29,23 @@ changes.  If it needs to be updated and this file regenerated, run:
 ```
 Adapters convert between OTIO and other formats.
 
-    Note that this class is not subclassed by adapters. Rather, an adapter is
-    a python module that implements at least one of the following functions:
+Note that this class is not subclassed by adapters. Rather, an adapter is
+a python module that implements at least one of the following functions:
 
-    .. code-block:: python
+.. code-block:: python
 
-        write_to_string(input_otio)
-        write_to_file(input_otio, filepath) (optionally inferred)
-        read_from_string(input_str)
-        read_from_file(filepath) (optionally inferred)
+    write_to_string(input_otio)
+    write_to_file(input_otio, filepath) (optionally inferred)
+    read_from_string(input_str)
+    read_from_file(filepath) (optionally inferred)
 
-    ...as well as a small json file that advertises the features of the adapter
-    to OTIO.  This class serves as the wrapper around these modules internal
-    to OTIO.  You should not need to extend this class to create new adapters
-    for OTIO.
+...as well as a small json file that advertises the features of the adapter
+to OTIO.  This class serves as the wrapper around these modules internal
+to OTIO.  You should not need to extend this class to create new adapters
+for OTIO.
 
-    For more information: https://opentimelineio.readthedocs.io/en/latest/tutorials/write-an-
+For more information: https://opentimelineio.readthedocs.io/en/latest/tutorials/write-an-
 adapter.html. # noqa
-    
 ```
 
 parameters:
@@ -84,10 +83,8 @@ parameters:
 *documentation*:
 
 ```
-
 An object that can be composed within a :class:`~Composition` (such as :class:`~Track` or 
 :class:`.Stack`).
-
 ```
 
 parameters:
@@ -101,11 +98,9 @@ parameters:
 *documentation*:
 
 ```
-
 Base class for an :class:`~Item` that contains :class:`~Composable`\s.
 
 Should be subclassed (for example by :class:`.Track` and :class:`.Stack`), not used directly.
-
 ```
 
 parameters:
@@ -207,10 +202,8 @@ parameters:
 *documentation*:
 
 ```
-
 The RationalTime class represents a measure of time of :math:`rt.value/rt.rate` seconds.
 It can be rescaled into another :class:`~RationalTime`'s rate.
-
 ```
 
 parameters:
@@ -224,11 +217,9 @@ parameters:
 *documentation*:
 
 ```
-
 The TimeRange class represents a range in time. It encodes the start time and the duration,
 meaning that :meth:`end_time_inclusive` (last portion of a sample in the time range) and
 :meth:`end_time_exclusive` can be computed.
-
 ```
 
 parameters:
@@ -261,14 +252,13 @@ parameters:
 ```
 Defines an OTIO plugin Manifest.
 
-    This is considered an internal OTIO implementation detail.
+This is considered an internal OTIO implementation detail.
 
-    A manifest tracks a collection of plugins and enables finding them by name
-    or other features (in the case of adapters, what file suffixes they
-    advertise support for).
+A manifest tracks a collection of plugins and enables finding them by name
+or other features (in the case of adapters, what file suffixes they
+advertise support for).
 
-    For more information, consult the documentation.
-    
+For more information, consult the documentation.
 ```
 
 parameters:
@@ -287,8 +277,7 @@ parameters:
 
 ```
 A class of plugin that is encoded in a python module, exposed via a
-    manifest.
-    
+manifest.
 ```
 
 parameters:
@@ -304,11 +293,9 @@ parameters:
 *documentation*:
 
 ```
-
 A :class:`~Clip` is a segment of editable media (usually audio or video).
 
 Contains a :class:`.MediaReference` and a trim on that media reference.
-
 ```
 
 parameters:
@@ -420,7 +407,6 @@ parameters:
 *documentation*:
 
 ```
-
 An ImageSequenceReference refers to a numbered series of single-frame image files. Each file can be 
 referred to by a URL generated by the :class:`~ImageSequenceReference`.
 
@@ -496,7 +482,6 @@ yield the first three target urls as:
 - ``file:///show/sequence/shot/sample_image_sequence.-0001.exr``
 - ``file:///show/sequence/shot/sample_image_sequence.0000.exr``
 - ``file:///show/sequence/shot/sample_image_sequence.0001.exr``
-
 ```
 
 parameters:
@@ -520,9 +505,7 @@ parameters:
 *documentation*:
 
 ```
-
 A time warp that applies a linear speed up or slow down across the entire clip.
-
 ```
 
 parameters:
@@ -543,13 +526,11 @@ Instead it affects the speed of the media displayed within that item.
 *documentation*:
 
 ```
-
 A marker indicates a marked range of time on an item in a timeline, usually with a name, color or 
 other metadata.
 
 The marked range may have a zero duration. The marked range is in the owning item's time coordinate 
 system.
-
 ```
 
 parameters:
@@ -566,12 +547,10 @@ parameters:
 *documentation*:
 
 ```
-
 Represents media for which a concrete reference is missing.
 
 Note that a :class:`~MissingReference` may have useful metadata, even if the location of the media 
 is not known.
-
 ```
 
 parameters:
@@ -587,7 +566,6 @@ parameters:
 *documentation*:
 
 ```
-
 A container which can hold an ordered list of any serializable objects. Note that this is not a 
 :class:`.Composition` nor is it :class:`.Composable`.
 
@@ -598,7 +576,6 @@ a named collection.
 
 A :class:`~SerializableCollection` is useful for serializing multiple timelines, clips, or media 
 references to a single file.
-
 ```
 
 parameters:
diff --git a/setup.py b/setup.py
index 48b90690c..9ed48682b 100644
--- a/setup.py
+++ b/setup.py
@@ -320,6 +320,7 @@ def run(self):
         'Programming Language :: Python :: 3.10',
         'Programming Language :: Python :: 3.11',
         'Programming Language :: Python :: 3.12',
+        'Programming Language :: Python :: 3.13',
         'Operating System :: OS Independent',
         'Natural Language :: English',
     ],
diff --git a/src/py-opentimelineio/opentimelineio/console/autogen_serialized_datamodel.py b/src/py-opentimelineio/opentimelineio/console/autogen_serialized_datamodel.py
index 3a33763d2..5e12b6b36 100644
--- a/src/py-opentimelineio/opentimelineio/console/autogen_serialized_datamodel.py
+++ b/src/py-opentimelineio/opentimelineio/console/autogen_serialized_datamodel.py
@@ -297,7 +297,7 @@ def _write_documentation(model):
             label = model[cl]["OTIO_SCHEMA"]
 
             if (cl.__doc__ is not None):
-                docstring = cl.__doc__.split("\n")
+                docstring = inspect.getdoc(cl).split("\n")
                 new_docstring = []
                 for line in docstring:
                     line = textwrap.wrap(line, width=100,