diff --git a/doc/conf.py b/doc/conf.py
index e5490563..1b833828 100644
--- a/doc/conf.py
+++ b/doc/conf.py
@@ -77,6 +77,7 @@
     "dask$": ":std:doc:`dask:index`",
     "pint$": ":std:doc:`pint <pint:index>`",
     "plotnine$": ":class:`plotnine.ggplot`",
+    "pyarrow$": ":std:doc:`pyarrow <pyarrow:python/index>`",
     "pyam$": ":std:doc:`pyam:index`",
     "sphinx$": ":std:doc:`sphinx <sphinx:index>`",
 }
@@ -108,6 +109,7 @@
     "platformdirs": ("https://platformdirs.readthedocs.io/en/latest", None),
     "plotnine": ("https://plotnine.org", None),
     "pyam": ("https://pyam-iamc.readthedocs.io/en/stable", None),
+    "pyarrow": ("https://arrow.apache.org/docs", None),
     "python": ("https://docs.python.org/3", None),
     "pytest": ("https://docs.pytest.org/en/stable", None),
     "sdmx1": ("https://sdmx1.readthedocs.io/en/stable", None),
diff --git a/doc/whatsnew.rst b/doc/whatsnew.rst
index da7c05e1..ceb834f8 100644
--- a/doc/whatsnew.rst
+++ b/doc/whatsnew.rst
@@ -4,7 +4,14 @@ What's new
 Next release
 ============
 
-- genno is compatible and tested with `NumPy 2.0 <https://numpy.org/doc/stable/release/2.0.0-notes.html>`_, released 2024-06-16 (:issue:`140`, :pull:`141`).
+- :mod:`genno` supports and is tested on:
+
+  - `Python 3.13 <https://www.python.org/downloads/release/python-3130/>`_, released 2024-10-07 (:pull:`143`).
+    As of release time, support for :class:`.SparseDataArray` awaits :mod:`sparse`, thus `numba <https://github.com/numba/numba/issues/9413>`__ and `llvmlite <https://github.com/numba/llvmlite/issues/1084>`__.
+    :class:`.SparseDataArray` should be usable once these dependencies are updated.
+  - `NumPy 2.0 <https://numpy.org/doc/stable/release/2.0.0-notes.html>`_, released 2024-06-16 (:issue:`140`, :pull:`141`).
+
+- Support for Python 3.8 is dropped (:pull:`143`), as it has reached end-of-life.
 
 v1.26.0 (2024-03-27)
 ====================