diff --git a/lib/Epuber/server/keyboard_control.js b/lib/Epuber/server/keyboard_control.js
index <HASH>..<HASH> 100644
--- a/lib/Epuber/server/keyboard_control.js
+++ b/lib/Epuber/server/keyboard_control.js
@@ -2,6 +2,13 @@
 window.addEventListener('keydown', function (e) {
     var l = window.location;
 
+    // alt == 18
+    // cmd == 91
+    if (e.which == 91) // cmd
+    {
+        return;
+    }
+
     switch (e.keyCode)
     {
         case 37: // left
@@ -23,4 +30,4 @@ window.addEventListener('keydown', function (e) {
 
             break;
     }
-});
+}, false);
[Server][keyboard_control.js] do not jump when command key is down