diff --git a/lib/lurker/json/schema/extensions.rb b/lib/lurker/json/schema/extensions.rb
index e230479..34db47d 100644
--- a/lib/lurker/json/schema/extensions.rb
+++ b/lib/lurker/json/schema/extensions.rb
@@ -12,7 +12,7 @@ def initialize(schema, options = {})
       def merge!(schema)
         return unless Lurker.upgrade?
 
-        @schema = @parser.parse_property(parent_property, schema)
+        @schema = @parser.plain.parse_property(parent_property, schema)
       end
     end
   end