README.md in bright_serializer-0.5.1 vs README.md in bright_serializer-0.5.2

@@ -78,10 +78,10 @@
 end
 ```
 
 ### Transform keys
 
-By default, keys or not transformed.
+By default, keys are not transformed.
 
 ```ruby
 class AccountSerializer
   include BrightSerializer::Serializer
   set_key_transform :underscore