diff --git a/.github/workflows/python-package.yml b/.github/workflows/python-package.yml
index 607a116..029e2ae 100644
--- a/.github/workflows/python-package.yml
+++ b/.github/workflows/python-package.yml
@@ -16,7 +16,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.7", "3.8", "3.9", "3.10"]
+        python-version: ["3.8", "3.9", "3.10", "3.11"]
 
     steps:
     - uses: actions/checkout@v2
diff --git a/docs/changelog.rst b/docs/changelog.rst
index 82a2a87..8aba664 100644
--- a/docs/changelog.rst
+++ b/docs/changelog.rst
@@ -5,8 +5,9 @@ Changelog
 -----------------
  * removed hbmqtt compatibility, importing amqtt is now mandatory
  * removed loop parameter from all functions
- * Python 3.10 compatibility
+ * Python 3.8 to 3.10 compatibility
  * Fixed a major bug in plugin api, see https://github.com/Yakifo/amqtt/pull/92
+ * Fixed a major bug due to CancelledError semantics changed in Python 3.8, see https://github.com/Yakifo/amqtt/pull/134
 
 0.10.0 - 2021-08-04
 -------------------
diff --git a/readme.rst b/readme.rst
index d3ddd5a..33f1f8a 100644
--- a/readme.rst
+++ b/readme.rst
@@ -66,13 +66,19 @@ From there the goal is to fix outstanding known issues and clean up the code.
 +----------+---------------------------+----------------------------+--------------+
 | Version  | hbmqtt compatibility      | Supported Python Versions  | PyPi Release |
 +----------+---------------------------+----------------------------+--------------+
-| 0.10.x   | YES - Drop-in Replacement | 3.7 - 3.9                  | 0.10.1       |
+| 0.10.x   | YES - Drop-in Replacement | 3.7*                       | 0.10.1       |
 +----------+---------------------------+----------------------------+--------------+
-| 0.11.x   | NO - Module renamed       | 3.7 - 3.10                 | No release   |
+| 0.11.x   | NO - Module renamed       | 3.8 - 3.10                 | No release   |
 |          | and small API differences |                            | yet          |
 +----------+---------------------------+----------------------------+--------------+
 
 
+* Due to a change in Python 3.8 where the semantics of asyncio.CancelledError was changed
+    to be a subclass of BaseException instead of Exception, old versions of hbmqtt and aMQTT
+    will break, see https://github.com/Yakifo/amqtt/issues/133.
+    Therefore only 3.7 is mentioned as supported version for 0.10.x.
+
+
 Getting started
 ---------------