lib/jsonapi/resource_serializer.rb in jsonapi-resources-0.8.0.beta2 vs lib/jsonapi/resource_serializer.rb in jsonapi-resources-0.8.0.beta3

@@ -346,10 +346,10 @@
       type = object_hash['type']
 
       @included_objects[type] = {} unless @included_objects.key?(type)
 
       if already_serialized?(type, id)
-        @included_objects[type][id][:object_hash].merge!(object_hash)
+        @included_objects[type][id][:object_hash].deep_merge!(object_hash)
         set_primary(type, id) if primary
       else
         @included_objects[type].store(id, primary: primary, object_hash: object_hash)
       end
     end