diff --git a/bower.json b/bower.json
index 7106332..4eaf0ad 100644
--- a/bower.json
+++ b/bower.json
@@ -1,6 +1,6 @@
 {
   "name": "flying-focus",
-  "version": "1.4.0",
+  "version": "1.4.1",
   "homepage": "http://n12v.com/focus-transition/",
   "authors": [
     "Nikita Vasilyev <me@elv1s.ru>"
diff --git a/standalone/flying-focus.js b/standalone/flying-focus.js
index 7a15dfa..e73c99d 100644
--- a/standalone/flying-focus.js
+++ b/standalone/flying-focus.js
@@ -1,4 +1,8 @@
 (function() {
+	if (!window.addEventListener) {
+		return;
+	}
+
 	'use strict';
 
 var DURATION = 150;
diff --git a/standalone/flying-focus.jspp.js b/standalone/flying-focus.jspp.js
index eee3bb4..3579cf5 100644
--- a/standalone/flying-focus.jspp.js
+++ b/standalone/flying-focus.jspp.js
@@ -1,4 +1,8 @@
 (function() {
+	if (!window.addEventListener) {
+		return;
+	}
+
 	/*> ../chrome/flying-focus.js */
 
 	var style = doc.createElement('style');