diff --git a/searx/static/themes/simple/gruntfile.js b/searx/static/themes/simple/gruntfile.js
index 57682430d..ca59cb562 100644
--- a/searx/static/themes/simple/gruntfile.js
+++ b/searx/static/themes/simple/gruntfile.js
@@ -88,7 +88,9 @@ module.exports = function(grunt) {
         warnings: true,
         compress: false,
         mangle: true,
-        sourceMap: true
+        sourceMap: {
+          includeSources: true
+        }
       },
       dist: {
         files: {