diff --git a/README.md b/README.md
index 45ae8af..f24cacd 100644
--- a/README.md
+++ b/README.md
@@ -23,6 +23,7 @@ On average, `cmdx` is **140x faster** than [PyMEL](https://github.com/LumaPictur
 
 | Date     | Version   | Event
 |:---------|:----------|:----------
+| Dec 2023 | 0.6.3 | Cloning of attributes
 | Apr 2020 | 0.6.0 | Stable Undo/Redo, dropped support for Maya 2015-2016
 | Mar 2020 | 0.5.1 | Support for Maya 2022
 | Mar 2020 | 0.5.0 | Stable release
diff --git a/build_livedocs.py b/build_livedocs.py
index 88eae6e..aa9f699 100644
--- a/build_livedocs.py
+++ b/build_livedocs.py
@@ -107,6 +107,12 @@ def test_{count}_{header}():
 # -*- coding: utf-8 -*-
 import os
 import sys
+
+# For nose
+import collections
+if not hasattr(collections, "Callable"):
+    collections.Callable = collections.abc.Callable
+
 import nose
 from nose.tools import assert_raises