diff --git a/Gruntfile.js b/Gruntfile.js
index 626531b29..1e204ad23 100644
--- a/Gruntfile.js
+++ b/Gruntfile.js
@@ -183,6 +183,7 @@ module.exports = function( grunt ) {
 				options: {
 					preserveComments: false,
 					sourceMap: true,
+					ASCIIOnly: true,
 					sourceMapName:
 						"dist/<%= grunt.option('filename').replace('.js', '.min.map') %>",
 					report: "min",