diff --git a/configstore/admin.py b/configstore/admin.py
index bbe2f90..f49703e 100644
--- a/configstore/admin.py
+++ b/configstore/admin.py
@@ -46,7 +46,6 @@ def add_view(self, request, form_url='', extra_context=None):
         model = self.model
         opts = model._meta
         app_label = opts.app_label
-        ordered_objects = opts.get_ordered_objects()
         obj = None
         configs = CONFIGS.items()
         def sort_by_label(a, b):
@@ -70,7 +69,6 @@ def sort_by_label(a, b):
             'has_delete_permission': self.has_delete_permission(request, obj),
             'has_file_field': False, # FIXME - this should check if form or formsets have a FileField,
             'has_absolute_url': hasattr(self.model, 'get_absolute_url'),
-            'ordered_objects': ordered_objects,
             'form_url': mark_safe(form_url),
             'opts': opts,
             'content_type_id': ContentType.objects.get_for_model(self.model).id,
diff --git a/configstore/models.py b/configstore/models.py
index 5f5b8c1..33e158d 100644
--- a/configstore/models.py
+++ b/configstore/models.py
@@ -19,3 +19,4 @@ def __unicode__(self):
 
     class Meta:
         unique_together = [('key', 'site')]
+        app_label = 'configstore'
diff --git a/configstore/serializer.py b/configstore/serializer.py
index 2d80a6f..8715191 100644
--- a/configstore/serializer.py
+++ b/configstore/serializer.py
@@ -6,7 +6,7 @@
 from django.core.exceptions import ObjectDoesNotExist
 from django.db.models.query import QuerySet
 from django.db import models
-from django.utils import simplejson
+import simplejson
 
 from decimal import Decimal
 
diff --git a/requirements.txt b/requirements.txt
index feded18..cf9aca7 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1 +1,2 @@
 pycrypto==2.6
+simplejson