diff --git a/assets/js/player.js b/assets/js/player.js
index 47a473e8..f6de9d38 100644
--- a/assets/js/player.js
+++ b/assets/js/player.js
@@ -9,6 +9,7 @@ var options = {
     windowOpacity: ['0', '0.5', '1'],
     textOpacity: ['0.5', '1'],
     persistTextTrackSettings: true,
+    enableSourceset: false,
     controlBar: {
         children: [
             'playToggle',