diff --git a/CHANGELOG.md b/CHANGELOG.md
index 23b048e8..f0b64fc8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -16,6 +16,9 @@ Version 2.0.0
   instances, starting and stopping them individually.  To manage this the
   local command line interface has been replaced with a remote interface on
   the master server that can be accessed through the clusterctl cli tool.
+- Rewritten the communication between slaves and the master from scratch.  The
+  new system is based on a WebSocket connection between the slaves and the
+  master server and provides efficient validated bi-directonal communication.
 
 ### Changes