diff --git a/gulp_tasks/distribution.js b/gulp_tasks/distribution.js
index ec5aac0..c732eab 100644
--- a/gulp_tasks/distribution.js
+++ b/gulp_tasks/distribution.js
@@ -3,43 +3,40 @@
 
 'use strict';
 
-var options = require('../gulp-options.js'),
-    gulp = require('gulp'),
-    clean = require('gulp-clean'),
-    webapp = require('./webapp.js'),
+var options = require('../gulp-options.js'), gulp = require('gulp'),
+    clean = require('gulp-clean'), webapp = require('./webapp.js'),
     imagemin = require('gulp-imagemin');
 
 var runSequence = require('run-sequence');
 
-gulp.task('webapp', function (callback) {
-    return webapp(callback);
+gulp.task('webapp', function(callback) {
+  return webapp(callback);
 });
 
-gulp.task('distribution:clean', function () {
-    return gulp
-        .src([options.dirname + '/dist'], { 'read': false })
-        .pipe(clean({'force': true}));
+gulp.task('distribution:clean', function() {
+  return gulp.src([options.dirname + '/dist'], {'read': false}).pipe(clean({
+    'force': true
+  }));
 });
 
-gulp.task('distribution:copy', function () {
-    return gulp
-        .src(['**/*'], { 'cwd': options.targetFolderPath + '/webapp' })
-        .pipe(gulp.dest(options.dirname + '/dist'));
+gulp.task('distribution:copy', function() {
+  return gulp.src(['**/*'], {'cwd': options.targetFolderPath + '/webapp'})
+      .pipe(gulp.dest(options.dirname + '/dist'));
 });
 
-gulp.task('imagemin', () =>
-    gulp.src([options.dirname + '/app/assets/images/*'])
-        .pipe(imagemin({
-            optimizationLevel: 3,
-            progressive: true,
-            interlaced: false,
-            svgoPlugins: [{
-                removeViewBox: false
-            }]
-        }))
-        .pipe(gulp.dest('dist/assets/images'))
-);
+gulp.task(
+    'imagemin',
+    () => gulp.src([options.dirname + '/app/assets/images/*'])
+              .pipe(imagemin({
+                optimizationLevel: 3,
+                progressive: true,
+                interlaced: false,
+                svgoPlugins: [{removeViewBox: false}]
+              }))
+              .pipe(gulp.dest('dist/assets/images')));
 
-module.exports = function (callback) {
-    return runSequence('distribution:clean', 'webapp', 'distribution:copy', 'imagemin', callback);
+module.exports = function(callback) {
+  return runSequence(
+      'distribution:clean', 'webapp', 'distribution:copy', 'imagemin',
+      callback);
 };