diff --git a/README.md b/README.md
index d057b10f..1cc3f705 100644
--- a/README.md
+++ b/README.md
@@ -146,6 +146,12 @@ Encryption (E2EE).
Adds persistent storage to a server with MongoDB. Can be used with the
y-websocket provider.
+
+ y-socket.io
+
+ A module that contains a simple socket.io backend for yjs document syncing.
+ The backend can be extended to a backend with authentication and persistence.
+ Also React.js bindings available for client side.