diff --git a/lib/videojs-resolution-switcher.js b/lib/videojs-resolution-switcher.js
index eae1c38..f2a926d 100644
--- a/lib/videojs-resolution-switcher.js
+++ b/lib/videojs-resolution-switcher.js
@@ -58,11 +58,11 @@
         this.controlText('Quality');
 
         if(options.dynamicLabel){
-          videojs.addClass(this.label, 'vjs-resolution-button-label');
+          videojs.dom.addClass(this.label, 'vjs-resolution-button-label');
           this.el().appendChild(this.label);
         }else{
           var staticLabel = document.createElement('span');
-          videojs.addClass(staticLabel, 'vjs-menu-icon');
+          videojs.dom.addClass(staticLabel, 'vjs-menu-icon');
           this.el().appendChild(staticLabel);
         }
         player.on('updateSources', videojs.bind( this, this.update ) );
@@ -362,6 +362,6 @@
     };
 
     // register the plugin
-    videojs.plugin('videoJsResolutionSwitcher', videoJsResolutionSwitcher);
+    videojs.registerPlugin('videoJsResolutionSwitcher', videoJsResolutionSwitcher);
   })(window, videojs);
 })();