1 files changed, 4 insertions, 1 deletions
diff --git a/web/app/model/Device.js b/web/app/model/Device.js
index b8434d6ad..588d53c1f 100644
--- a/web/app/model/Device.js
+++ b/web/app/model/Device.js
@@ -33,6 +33,9 @@ Ext.define('Traccar.model.Device', {
     }, {
         name: 'lastUpdate',
         type: 'date',
-        dateWriteFormat: 'c'
+        dateFormat: 'c'
+    }, {
+        name: 'groupId',
+        type: 'int'
     }]
 });