Index: lib/icon.js
diff --git a/lib/icon.js b/lib/icon.js
index a2e56a174a24d4c36fec0a658c108990bc92e8bb..c7590fce9c8f4bef26cbb7ab428a58b7ee97afed 100644
--- a/lib/icon.js
+++ b/lib/icon.js
@@ -19,7 +19,7 @@
 
 "use strict";
 
-let {FilterNotifier} = require("filterNotifier");
+const {FilterNotifier} = require("filterNotifier");
 
 const frameOpacities =  [0.0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9,
                          1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0,
@@ -185,7 +185,7 @@ let stopIconAnimation =
  * @return {Promise} A promise that is fullfilled when
  *                   the icon animation has been stopped.
  */
-exports.stopIconAnimation = function()
+exports.stopIconAnimation = () =>
 {
   stopRequested = true;
   return notRunning.then(() =>
@@ -201,7 +201,7 @@ exports.stopIconAnimation = function()
  *
  * @param {string} type  The notification type (i.e: "information" or "critical")
  */
-exports.startIconAnimation = function(type)
+exports.startIconAnimation = type =>
 {
   notRunning = new Promise(resolve =>
   {