diff --git a/scidash/sciunitmodels/api/views.py b/scidash/sciunitmodels/api/views.py
index 4df3c24e..60de16d3 100644
--- a/scidash/sciunitmodels/api/views.py
+++ b/scidash/sciunitmodels/api/views.py
@@ -22,8 +22,9 @@ class ModelClassViewSet(viewsets.ReadOnlyModelViewSet):
     permission_classes = (permissions.AllowAny, )
 
 
-class ModelInstanceViewSet(viewsets.ReadOnlyModelViewSet):
+class ModelInstanceViewSet(viewsets.ModelViewSet):
     queryset = ModelInstance.objects.all()
     serializer_class = ModelInstanceSerializer
-    permission_classes = (permissions.AllowAny,)
-    filter_class = ModelInstanceFilter
\ No newline at end of file
+    permission_classes = (permissions.IsAuthenticatedOrReadOnly,)
+    filter_class = ModelInstanceFilter
+
diff --git a/service/kubernetes/scidash/scidash-deployment.yaml b/service/kubernetes/scidash/scidash-deployment.yaml
index e801f960..13a23d3f 100644
--- a/service/kubernetes/scidash/scidash-deployment.yaml
+++ b/service/kubernetes/scidash/scidash-deployment.yaml
@@ -6,7 +6,7 @@ metadata:
   name: scidash
   namespace: scidash-testing
 spec:
-  replicas: 2
+  replicas: 1
   selector:
     matchLabels:
       app: scidash