README.md in graphql-batch-0.2.0 vs README.md in graphql-batch-0.2.1

@@ -46,10 +46,10 @@
 Use the batch execution strategy with your schema
 
 ```ruby
 MySchema = GraphQL::Schema.new(query: MyQueryType)
 MySchema.query_execution_strategy = GraphQL::Batch::ExecutionStrategy
-MySchema.mutation_execution_strategy = GraphQL::Batch::ExecutionStrategy
+MySchema.mutation_execution_strategy = GraphQL::Batch::MutationExecutionStrategy
 ```
 
 The loader class can be used from the resolve proc for a graphql field by calling `.for` with the grouping arguments to get a loader instance, then call `.load` on that instance with the key to load.
 
 ```ruby