fix add/delete sliver using inline on slice page
diff --git a/plstackapi/core/serializers.py b/plstackapi/core/serializers.py
index 381db05..b4ffe68 100644
--- a/plstackapi/core/serializers.py
+++ b/plstackapi/core/serializers.py
@@ -165,6 +165,7 @@
         fields = ('id',
                   'instance_id',
                   'name',
+                  'instance_name',
                   'ip',
                   'image',
                   'key',