diff --git a/xos/tosca/resources/xosresource.py b/xos/tosca/resources/xosresource.py
index 4e8d041..eddd8cb 100644
--- a/xos/tosca/resources/xosresource.py
+++ b/xos/tosca/resources/xosresource.py
@@ -147,11 +147,9 @@
         self.postprocess(xos_obj)
 
     def update(self, obj):
-        return # XXX this doesn't work yet
-
         xos_args = self.get_xos_args()
-        for (k,v) in xos_args:
-            setattr(obj, k)
+        for (k,v) in xos_args.items():
+            setattr(obj, k, v)
         obj.save()
 
     def delete(self, obj):