diff --git a/lib/utils/router.js b/lib/utils/router.js
index e2e8259..3831cd8 100644
--- a/lib/utils/router.js
+++ b/lib/utils/router.js
@@ -85,7 +85,7 @@ define(['Navigo'], function (Navigo) {
     var router = new Navigo(null, true);
 
     router
-      .on(/^\/?#?\/([\w]{2})?\/?(map|graph)?\/?([a-f\d]{12})?([a-f\d\-]{25})?\/?(?:(\d+)\/([\d.]+)\/([\d.]+))?$/, customRoute)
+      .on(/^\/?#?\/([\w]{2})?\/?(map|graph)?\/?([a-f\d]{12})?([a-f\d\-]{25})?\/?(?:(\d+)\/(-?[\d.]+)\/(-?[\d.]+))?$/, customRoute)
       .on({
         '*': function () {
           router.fullUrl();