diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 39c9b9d72..58e9b600b 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -58,7 +58,7 @@ jobs:
         # python 3.11 fails with "src/twisted/test/raiser.c:198:12: fatal error: longintrepr.h: No such file or directory"
         # twisted doesn't yet support 3.11 formally: https://github.com/twisted/twisted/blob/trunk/pyproject.toml#L24
         python-version: ['3.9', '3.11', 'pypy-3.9']
-        framework: ['asyncio', 'tw2210', 'twtrunk']
+        framework: ['asyncio', 'tw2403', 'twtrunk']
 
     # https://github.blog/changelog/2020-04-15-github-actions-new-workflow-features/
     # https://docs.github.com/en/free-pro-team@latest/actions/reference/workflow-syntax-for-github-actions#jobsjob_idstepscontinue-on-error
diff --git a/autobahn/_version.py b/autobahn/_version.py
index 602fdd653..965c97f24 100644
--- a/autobahn/_version.py
+++ b/autobahn/_version.py
@@ -24,6 +24,6 @@
 #
 ###############################################################################
 
-__version__ = '23.6.2'
+__version__ = '24.4.1'
 
 __build__ = '00000000-0000000'
diff --git a/docs/changelog.rst b/docs/changelog.rst
index 2fff51740..35681f6d7 100644
--- a/docs/changelog.rst
+++ b/docs/changelog.rst
@@ -5,6 +5,11 @@
 Changelog
 =========
 
+24.4.1
+------
+
+- new: bump minimum required Twisted version to 24.3.0 (`see also <https://github.com/crossbario/autobahn-python/pull/1634>`_)
+
 23.6.2
 ------
 
diff --git a/setup.py b/setup.py
index 881edd8ce..47a17b165 100644
--- a/setup.py
+++ b/setup.py
@@ -46,7 +46,7 @@
 # as we make claim to support older Twisted!)
 extras_require_twisted = [
     "zope.interface>=5.2.0",        # Zope Public License
-    "twisted>=20.3.0",              # MIT license (https://pypi.org/project/Twisted/20.3.0/)
+    "twisted>=24.3.0",              # MIT license (https://pypi.org/project/Twisted/24.3.0/)
     "attrs>=20.3.0"                 # MIT license (https://pypi.org/project/attrs/19.2.0/)
 ]
 
diff --git a/tox.ini b/tox.ini
index 0903e5edb..6bfafc608 100644
--- a/tox.ini
+++ b/tox.ini
@@ -3,11 +3,9 @@ skip_missing_interpreters = true
 envlist =
     flake8
     sphinx
-    py39-{tw203,tw2210,twtrunk,asyncio}
-    # Twisted <22.10 on Python 3.11 fails with:
-    # src/twisted/test/raiser.c:198:12: fatal error: longintrepr.h: Datei oder Verzeichnis nicht gefunden
-    py311-{tw2210,twtrunk,asyncio}
-    pypy39-{tw2210,twtrunk,asyncio}
+    py39-{tw2403,twtrunk,asyncio}
+    py311-{tw2403,twtrunk,asyncio}
+    pypy39-{tw2403,twtrunk,asyncio}
 
 
 # MAP: GitHub Actions Python Name => Tox Env Name (for Python)
@@ -38,14 +36,11 @@ deps =
     git+https://github.com/ilanschnell/bitarray.git@master#egg=bitarray
 
     cytoolz
-
-    ; twisted dependencies
-    tw203: twisted==20.3.0
-    tw2210: twisted==22.10.0
+    tw2403: twisted==24.3.0
 
     # twtrunk: https://github.com/twisted/twisted/archive/trunk.zip
     twtrunk: git+https://github.com/twisted/twisted
-    {tw203,tw2210,twtrunk}: pytest-twisted
+    {tw2403,twtrunk}: pytest-twisted
 
     ; asyncio dependencies
     asyncio: pytest_asyncio
@@ -91,7 +86,7 @@ setenv =
     # controls test setup according to networking framework
     asyncio: USE_ASYNCIO=1
     asyncio: PYTHONPATH={toxinidir}
-    tw203,tw2210,twtrunk: USE_TWISTED=1
+    tw2403,twtrunk: USE_TWISTED=1
 
     # this enables "autobahn/test/test_rng.py" (on Linux),
     # which tests entropy depletion, and tests how to correctly
@@ -109,7 +104,7 @@ commands =
     asyncio: pytest -s -v -rfP --ignore=./autobahn/twisted ./autobahn
 
     # IMPORTANT: trial doesn't allow to recurse-and-exclude, and hence we need this looong list (because we must exclude "asyncio")
-    tw203,tw2210: trial        --no-recurse autobahn.test autobahn.twisted.test autobahn.websocket.test autobahn.rawsocket.test autobahn.wamp.test autobahn.xbr.test autobahn.nvx.test
+    tw2403: trial        --no-recurse autobahn.test autobahn.twisted.test autobahn.websocket.test autobahn.rawsocket.test autobahn.wamp.test autobahn.xbr.test autobahn.nvx.test
     twtrunk: python -m twisted.trial --no-recurse autobahn.test autobahn.twisted.test autobahn.websocket.test autobahn.rawsocket.test autobahn.wamp.test autobahn.xbr.test autobahn.nvx.test