diff -r 48f5380c26d0 -r 1190ea937f2d cms/app-client/mirage/serializers/theme.js
--- a/cms/app-client/mirage/serializers/theme.js	Fri Jun 09 15:22:02 2017 +0200
+++ b/cms/app-client/mirage/serializers/theme.js	Sat Jun 10 08:33:03 2017 +0200
@@ -1,6 +1,6 @@
 import { JSONAPISerializer } from 'ember-cli-mirage';
 
-import _ from 'lodash/lodash';
+import _ from 'lodash';
 
 export default JSONAPISerializer.extend({
 
@@ -45,7 +45,7 @@
       array = response.models;
     }
     return {
-      themes: _(array).map((theme) => { return [theme.id, { count: theme.count, label: theme.label }]; }).object().value(),
+      themes: _(array).map((theme) => { return [theme.id, { count: theme.count, label: theme.label }]; }).fromPairs().value(),
       meta: {
         total: total
       }