diff --git a/app/assets/javascripts/app/lib/bootstrap/modal.js b/app/assets/javascripts/app/lib/bootstrap/modal.js
index 1a23324c2..6a6468667 100644
--- a/app/assets/javascripts/app/lib/bootstrap/modal.js
+++ b/app/assets/javascripts/app/lib/bootstrap/modal.js
@@ -147,11 +147,11 @@
 
   Modal.prototype.escape = function () {
     if (this.isShown && this.options.keyboard) {
-      this.$element.on('keydown.dismiss.bs.modal', $.proxy(function (e) {
+      $(window).on('keydown.dismiss.bs.modal', $.proxy(function (e) {
         e.which == 27 && this.hide()
       }, this))
     } else if (!this.isShown) {
-      this.$element.off('keydown.dismiss.bs.modal')
+      $(window).off('keydown.dismiss.bs.modal')
     }
   }