diff --git a/README.md b/README.md
index caffb3e..922c990 100644
--- a/README.md
+++ b/README.md
@@ -76,6 +76,14 @@ Configuration options can be passed to the client by adding querystring paramete
 * **overlay** - Set to `false` to disable the DOM-based client-side overlay.
 * **reload** - Set to `true` to auto-reload the page when webpack gets stuck.
 
+## How it Works
+
+The middleware installs itself as a webpack plugin, and listens for compiler events.
+
+Each connected client gets a [Server Sent Events](http://www.html5rocks.com/en/tutorials/eventsource/basics/) connection, the server will publish notifications to connected clients on compiler events.
+
+When the client receives a message, it will check to see if the local code is up to date. If it isn't up to date, it will trigger webpack hot module reloading.
+
 ## License
 
 Copyright 2015 Glen Mailer.
diff --git a/middleware.js b/middleware.js
index f45fd70..9aa9d39 100644
--- a/middleware.js
+++ b/middleware.js
@@ -50,7 +50,7 @@ function createEventStream(heartbeat) {
       res.writeHead(200, {
         'Access-Control-Allow-Origin': '*',
         'Content-Type': 'text/event-stream;charset=utf-8',
-        'Cache-Control': 'no-cache',
+        'Cache-Control': 'no-cache, no-transform',
         'Connection': 'keep-alive'
       });
       res.write('\n');