diff --git a/src/js/utils/detector.js b/src/js/utils/detector.js
index 99a7ab8..3010808 100644
--- a/src/js/utils/detector.js
+++ b/src/js/utils/detector.js
@@ -9,7 +9,7 @@ export default {
     try {
       var canvas = document.createElement('canvas');
 
-      return !!( window.WebGLRenderingContext && ( canvas.getContext('webgl') || canvas.getContext('experimental-webgl') ) );
+      return !!(window.WebGLRenderingContext && (canvas.getContext('webgl') || canvas.getContext('experimental-webgl')));
     } catch(e) {
       return false;
     }
diff --git a/src/js/utils/keyboard.js b/src/js/utils/keyboard.js
index 4e9533d..24c93b5 100644
--- a/src/js/utils/keyboard.js
+++ b/src/js/utils/keyboard.js
@@ -4,8 +4,6 @@ const ALIAS = {
   'right'		: 39,
   'down'		: 40,
   'space'		: 32,
-  'pageup'	: 33,
-  'pagedown': 34,
   'tab'		  : 9,
   'escape'	: 27
 };