diff --git a/Doc/license.rst b/Doc/license.rst
index cbe918bd1acfe3..814b6829f6b2bd 100644
--- a/Doc/license.rst
+++ b/Doc/license.rst
@@ -1042,6 +1042,8 @@ https://www.w3.org/TR/xml-c14n2-testcases/ and is distributed under the
    OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 
+.. _mimalloc-license:
+
 mimalloc
 --------
 
diff --git a/Doc/whatsnew/3.13.rst b/Doc/whatsnew/3.13.rst
index 65985ddc65a86f..efcbff6b785f89 100644
--- a/Doc/whatsnew/3.13.rst
+++ b/Doc/whatsnew/3.13.rst
@@ -1612,6 +1612,11 @@ Build Changes
 * ``wasm32-emscripten`` is no longer a supported platform.
   (Contributed by Brett Cannon in :gh:`115192`.)
 
+* Python now bundles the `mimalloc library <https://github.com/microsoft/mimalloc>`__.
+  It is licensed under the MIT license, see :ref:`mimalloc license <mimalloc-license>`.
+  The bundled mimalloc has custom changes, see :gh:`113141` for details.
+  (Contributed by Dino Viehland in :gh:`109914`.)
+
 
 C API Changes
 =============