diff --git a/gulpfile.js b/gulpfile.js
index e99eb2d..963d767 100644
--- a/gulpfile.js
+++ b/gulpfile.js
@@ -8,6 +8,7 @@ const pump          = require('pump');
 const jshint        = require('gulp-jshint');
 const replace       = require('gulp-replace');
 const connect       = require('gulp-connect');
+const clean         = require('gulp-clean');
 
 var paths = {
     srcJS:    'src/js/*.js',