diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index a8fb1f8e9..0bbd6c8ea 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -9,11 +9,11 @@ If you want to implement something big: Please start a discussion about that in
 
 ## Python
 
-Use python 3.6 for development. Paperless supports python 3.6, 3.7 and 3.8.
+Paperless supports python 3.6, 3.7, 3.8 and 3.9.
 
 ## Branches
 
-master always reflects the latest release.
+master always reflects the latest release. Apart from changes to the documentation or readme, absolutely no functional changes on this branch in between releases.
 
 dev contains all changes that will be part of the next release. Use this branch to start making your changes.