README.md in rv-logstasher-1.3.2 vs README.md in rv-logstasher-1.4.0

@@ -74,46 +74,60 @@
         fields[:user] = current_user && current_user.mail
         fields[:site] = request.path =~ /^\/api/ ? 'api' : 'user'
       end
     end
 
+### Filtering out controller params
+
+You may not want to log certain parameters which have sensitive information in
+them, e.g. `password`. This can be set using the `filter_parameters` option:
+
+    # Filter out some field you don't want to show
+    config.logstasher.filter_parameters << 'foo'
+
+Note that by default this is set to `['password', 'password_confirmation']`, so
+be careful when explicitly setting, as you may lose this filtering:
+
+    # NOTE: password and password_confirmation will no longer be filtered
+    config.logstasher.filter_parameters = ['foo']
+
+Any filtered parameter will still show in the `params` field, but it's value
+will be `[FILTERED]`.
+
 ## Installation for Grape Application
 
-### In your Gemfile: 
+### In your Gemfile:
 
     gem "rv-logstasher"
     gem "grape_logging"
-    
-    
+
 ### Init logger:
-    
+
     module TestApp
       def self.logger
         @logger ||= LogStasher.logger_for_app('app_name', Rack::Directory.new("").root, STDOUT)
       end
     end
 
 ### Setup Grape request/exception logging
-     
+
     module TestApp
       class API < Grape::API
         logger TestApp.logger
         use GrapeLogging::Middleware::RequestLogger, logger: TestApp.logger
-        
+
         rescue_from TestApp::NotFound do |err|
-          # Tag your exception 
+          # Tag your exception
           API.logger.info(exception: err, tags: "rescued_exception", status: 404)
           error_response(message: "Not found", status: 404)
         end
 
         rescue_from :all do |e|
           API.logger.error(e)
           error_response(message: e.message, status: 500)
         end
       end
     end
-
-
 
 ## Copyright
 
 Copyright (c) 2016 Reevoo Ltd, released under the MIT license