diff --git a/conf/Gruntfile.js b/conf/Gruntfile.js
index b39d74eb6b41ce0974b6a7af073d1572fccde57a..2968b96a4e1ed39f07063a1bd8e043b7fd920b41 100644
--- a/conf/Gruntfile.js
+++ b/conf/Gruntfile.js
@@ -60,7 +60,7 @@ module.exports = function (grunt) {
                         'closure/externs/html2canvas.js',
                         'closure/externs/vmap.js'
                     ],
-                    compilation_level: 'ADVANCED',
+                    compilation_level: 'SIMPLE',
                     manage_closure_dependencies: true,
                     generate_exports: true,
                     angular_pass: true,