diff --git a/AUTHORS.rst b/AUTHORS.rst
index 1929bdfc..f31de825 100644
--- a/AUTHORS.rst
+++ b/AUTHORS.rst
@@ -51,3 +51,5 @@ Contributions
 - Dimitris Spathis
 - Filip Malkowski
 - George Wambold
+- Brunno Vanelli
+- Maximilian Lohmann
diff --git a/CHANGES.rst b/CHANGES.rst
index dd70bd81..de3d7988 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -4,6 +4,16 @@ Changelog
 
 tsfresh uses `Semantic Versioning <http://semver.org/>`_
 
+Version 0.20.0
+==============
+
+- Breaking Change
+    - The matrixprofile package becomes an optional dependency
+
+- Bugfixes/Typos/Documentation:
+    - Fix feature extraction of Friedrich coefficients for pandas>1.3.5
+    - Fix file paths after example notebooks were moved
+
 Version 0.19.0
 ==============
 
diff --git a/README.md b/README.md
index 47d3686c..a7c822e2 100644
--- a/README.md
+++ b/README.md
@@ -121,14 +121,21 @@ If you are interested in the technical workings, go to see our comprehensive Rea
 
 The algorithm, especially the filtering part are also described in the paper mentioned above.
 
-If you have some questions or feedback you can find the developers in the [gitter chatroom.](https://gitter.im/tsfresh/Lobby?utm_source=share-link&utm_medium=link&utm_campaign=share-link)
-
 We appreciate any contributions, if you are interested in helping us to make *TSFRESH* the biggest archive of feature extraction methods in python, just head over to our [How-To-Contribute](http://tsfresh.readthedocs.io/en/latest/text/how_to_contribute.html) instructions.
 
 If you want to try out `tsfresh` quickly or if you want to integrate it into your workflow, we also have a docker image available:
 
     docker pull nbraun/tsfresh
 
+
+## Backwards compatibility
+
+If you need to reproduce or update time-series features, which were computed with the `matrixprofile` feature calculators, you need to create a Python 3.8 environment:
+
+    conda create --name tsfresh__py_3.8 python=3.8
+    conda activate tsfresh__py_3.8
+    pip install tsfresh[matrixprofile]
+
 ## Acknowledgements
 
 The research and development of *TSFRESH* was funded in part by the German Federal Ministry of Education and Research under grant number 01IS14004 (project iPRODICT).