diff --git a/README.md b/README.md
index 524512e..c4c867f 100644
--- a/README.md
+++ b/README.md
@@ -38,6 +38,11 @@ let mySmartsocket = new smartsocket.Smartsocket({
   port: 3000 // the port smartsocket will listen on
 });
 
+// optional:
+// run this with anothoer existing server like express
+declare var someExpressServer // read the express docs about how express actually works
+mySmartsocket.setServer(someExpressServer)
+
 // A "SocketRole" can be referenced by "SocketFunction"s.
 // All "SocketRequest"s carry authentication data for a specific "SocketRole".
 // "SocketFunction"s know which "SocketRole"s are allowed to execute them
diff --git a/ts/smartsocket.classes.smartsocket.ts b/ts/smartsocket.classes.smartsocket.ts
index 80919bf..92212f6 100644
--- a/ts/smartsocket.classes.smartsocket.ts
+++ b/ts/smartsocket.classes.smartsocket.ts
@@ -47,6 +47,7 @@ export class Smartsocket {
 
   /**
    * starts the server with another server
+   * also works with an express style server
    */
   async setServer(httpServerArg: http.Server) {
     this.httpServer = httpServerArg;