diff --git a/app/helpers/flash_helper.rb b/app/helpers/flash_helper.rb
index 805d878..a1b2085 100644
--- a/app/helpers/flash_helper.rb
+++ b/app/helpers/flash_helper.rb
@@ -1,24 +1,26 @@
 module FlashHelper
 
-  def bootstrap_class_for(flash_type)
-    {
-      success: 'alert-success',
-      error:   'alert-danger',
-      alert:   'alert-warning',
-      notice:  'alert-info'
-    }.fetch(flash_type.to_sym, flash_type.to_s)
-  end
-
   def flash_messages
     flash.each do |msg_type, message|
       concat(
         content_tag(:div, message, class: "alert #{bootstrap_class_for(msg_type)} fade in") do
           concat content_tag(:button, 'x', class: 'close', data: { dismiss: 'alert' })
           concat message
         end
       )
     end
 
     nil
   end
+
+  private
+
+  def bootstrap_class_for(flash_type)
+    {
+      success: 'alert-success',
+      error:   'alert-danger',
+      alert:   'alert-warning',
+      notice:  'alert-info'
+    }.fetch(flash_type.to_sym, flash_type.to_s)
+  end
 end