diff --git a/src/lib/recorder.js b/src/lib/recorder.js
index ed3d191..dda894c 100644
--- a/src/lib/recorder.js
+++ b/src/lib/recorder.js
@@ -79,7 +79,7 @@ export default class {
   }
 
   _micCaptured (stream) {
-    this.context = new AudioContext()
+    this.context = new(window.AudioContext || window.webkitAudioContext)()
     this.input = this.context.createMediaStreamSource(stream)
     this.processor = this.context.createScriptProcessor(this.bufferSize, 1, 1)
     this.duration = this._duration