diff --git a/README.md b/README.md
index 12e1e69..c1cce77 100644
--- a/README.md
+++ b/README.md
@@ -77,7 +77,7 @@ $ gulp prod
 
 * Upload the entire `server` folder to your server and make your web server (Apache, Nginx...) expose the `server/public` folder.
 
-* Edit your `server/config.js` with appropriate settings (listening IP/port, logging options, TLS certificate, etc).
+* Edit your `server/config.js` with appropriate settings (listening IP/port, logging options, **valid** TLS certificate, etc). Also set the proper remote WebSocket port in `client/config.js`.
 
 * Within your server, run the server side Node.js application. We recommend using the [forever](https://www.npmjs.com/package/forever) NPM daemon launcher, but any other can be used: