diff --git a/demo/index.html b/demo/index.html
index 674aea78..b973dcf6 100644
--- a/demo/index.html
+++ b/demo/index.html
@@ -10,7 +10,7 @@
 <body>
 <a href="https://github.com/ravenstine/goertzeljs"><img style="position: absolute; top: 0; right: 0; border: 0;" src="https://camo.githubusercontent.com/e7bbb0521b397edbd5fe43e7f760759336b5e05f/68747470733a2f2f73332e616d617a6f6e6177732e636f6d2f6769746875622f726962626f6e732f666f726b6d655f72696768745f677265656e5f3030373230302e706e67" alt="Fork me on GitHub" data-canonical-src="https://s3.amazonaws.com/github/ribbons/forkme_right_green_007200.png"></a>
 <header>
-  This is a demo for Goertzel.js.  It can detect dial-tones(aka DTMF, Touch-tone) through your microphone.  This will only work in newer versions of modern browsers such as Google Chrome and Firefox, or any browser that properly supports WebRTC.
+  This is a demo for Goertzel.js.  It can detect dial-tones(aka DTMF, Touch-tone) through your microphone.  This will only work in newer versions of modern browsers such as Google Chrome and Firefox, or any browser that properly supports the `getUserMedia` browser API.
 
   To test the demo, use your phone(or play <a href="http://www.youtube.com/watch?v=qg9xrP_U1Cg" target="_blank">this video</a>) to generate dial-tones.  The browser should pick up samples through your microphone and use them to detect the dial-tones.  The corresponding digits should appear below.
 </header>
