diff --git a/CHANGELOG.txt b/CHANGELOG.txt
index 95e23bed8..625f9566a 100644
--- a/CHANGELOG.txt
+++ b/CHANGELOG.txt
@@ -1,6 +1,22 @@
 Full release notes, with more details and upgrade information, are available at:
 https://channels.readthedocs.io/en/latest/releases
 
+
+4.2.1 (2025-03-29)
+------------------
+
+Channels 4.2.1 primarily updates the metadata for supported Python and Django
+versions.
+
+* Added official support for Django 5.2 LTS.
+
+* Added official support for Python 3.13.
+
+* Added a warning for the length of the channel layer group names.
+
+See also the `Version 4.2.1 release notes
+<https://channels.readthedocs.io/en/latest/releases/4.2.1.html>`_ in the docs.
+
 4.2.0 (2024-11-15)
 ------------------
 
diff --git a/channels/__init__.py b/channels/__init__.py
index 60912c2d0..0bc23cd2c 100644
--- a/channels/__init__.py
+++ b/channels/__init__.py
@@ -1,4 +1,4 @@
-__version__ = "4.2.0"
+__version__ = "4.2.1"
 
 
 DEFAULT_CHANNEL_LAYER = "default"
diff --git a/docs/releases/4.2.1.txt b/docs/releases/4.2.1.txt
new file mode 100644
index 000000000..959810a41
--- /dev/null
+++ b/docs/releases/4.2.1.txt
@@ -0,0 +1,13 @@
+4.2.1 Release Notes
+===================
+
+Channels 4.2.1 is a bugfix release in the 4.1 series.
+
+Bugfixes & Small Changes
+------------------------
+
+* Added official support for Django 5.2 LTS.
+
+* Added official support for Python 3.13.
+
+* Added a warning for the length of the channel layer group names.
diff --git a/docs/releases/index.rst b/docs/releases/index.rst
index f4954862a..e0ff7df2a 100644
--- a/docs/releases/index.rst
+++ b/docs/releases/index.rst
@@ -4,6 +4,7 @@ Release Notes
 .. toctree::
    :maxdepth: 1
 
+   4.2.1
    4.2.0
    4.1.0
    4.0.0
diff --git a/setup.cfg b/setup.cfg
index 51b27c138..bc60b699c 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -26,6 +26,7 @@ classifiers =
     Framework :: Django :: 4.2
     Framework :: Django :: 5.0
     Framework :: Django :: 5.1
+    Framework :: Django :: 5.2
     Topic :: Internet :: WWW/HTTP
 
 [options]