diff --git a/README.md b/README.md
index a440caa..3901b0e 100644
--- a/README.md
+++ b/README.md
@@ -1,8 +1,3 @@
 # Cadmium protocol documentation
 
-**Cadmium** is new instant messaging system which is a refinement of ideas from XMPP and Matrix.org.
-
-This repo contains documentation about Cadmium protocol and other things.
-
-Protocol specification сan be found in `protocol-spec` folder.  
-Specs currently **unstable** and have status *WIP (Work-In-Progress)*.
+It is old version of Cadmium protocol. Archived for historical purpose.