diff --git a/public/src/utils.js b/public/src/utils.js
index cfc9f5208f..2fa9d047fa 100644
--- a/public/src/utils.js
+++ b/public/src/utils.js
@@ -93,7 +93,7 @@
 
 		//http://dense13.com/blog/2009/05/03/converting-string-to-slug-javascript/
 		slugify: function(str) {
-			var	invalidChars = XRegExp('[^\\p{L} -]', 'g');
+			var	invalidChars = XRegExp('[^\\p{L} 0-9\-]', 'g');
 
 			str = str.replace(/^\s+|\s+$/g, ''); // trim
 			str = str.toLowerCase();