diff -r 48f5380c26d0 -r 1190ea937f2d cms/app-client/mirage/serializers/datestat.js
--- a/cms/app-client/mirage/serializers/datestat.js	Fri Jun 09 15:22:02 2017 +0200
+++ b/cms/app-client/mirage/serializers/datestat.js	Sat Jun 10 08:33:03 2017 +0200
@@ -1,9 +1,9 @@
 import { JSONAPISerializer } from 'ember-cli-mirage';
 
-import _ from 'lodash/lodash';
+import _ from 'lodash';
 
 export default JSONAPISerializer.extend({
     serialize(response) {
-        return {'datestats': _(response.models).map((dateinfo) => { return [dateinfo.id, dateinfo.count];}).object().value()};
+        return {'datestats': _(response.models).map((dateinfo) => { return [dateinfo.id, dateinfo.count];}).fromPairs().value()};
     }
 });