README.md in semantic_logger-3.1.0 vs README.md in semantic_logger-3.2.0

@@ -63,10 +63,10 @@
 
 # Set the global default log level
 SemanticLogger.default_level = :trace
 
 # Log to a file, and use the colorized formatter
-SemanticLogger.add_appender(file: 'development.log', formatter: :color)
+SemanticLogger.add_appender(file_name: 'development.log', formatter: :color)
 ```
 
 If running rails, see: [Semantic Logger Rails](http://rocketjob.github.io/semantic_logger/rails.html)
 
 ## Author