diff --git a/src/main/javascript/view/MainView.js b/src/main/javascript/view/MainView.js
index d75eef0b..f49b3768 100644
--- a/src/main/javascript/view/MainView.js
+++ b/src/main/javascript/view/MainView.js
@@ -111,7 +111,7 @@ SwaggerUi.Views.MainView = Backbone.View.extend({
 
   addResource: function(resource, auths){
     // Render a resource and add it to resources li
-    resource.id = resource.id.replace(/[[\]{}()*+?,\\/^$|#\s]/g, '_');
+    resource.id = resource.id.replace(/[^a-zA-Z\d]/g, function(str) { return str.charCodeAt(0); });
 
     // Make all definitions available at the root of the resource so that they can
     // be loaded by the JSonEditor