diff --git a/app/models/application_record.rb b/app/models/application_record.rb
index 27ed3d56..985df966 100644
--- a/app/models/application_record.rb
+++ b/app/models/application_record.rb
@@ -5,8 +5,8 @@ class ApplicationRecord < ActiveRecord::Base
 
   # Obtener una lista filtrada de atributos al momento de serializar
   #
-  # @return [Hash]
+  # @return [String]
   def to_yaml(options = {})
-    self.class.inspection_filter.filter attributes
+    self.class.inspection_filter.filter(attributes).to_yaml(options)
   end
 end