diff --git a/lib/faker/finance.rb b/lib/faker/finance.rb
index 28ce33043e..d35a72fcb3 100644
--- a/lib/faker/finance.rb
+++ b/lib/faker/finance.rb
@@ -1,6 +1,8 @@
 module Faker
   class Finance < Base
-    CREDIT_CARD_TYPES = [ :visa, :mastercard,  :discover, :american_express, :diners_club, :jcb, :switch, :solo, :dankort, :maestro, :forbrugsforeningen, :laser ]
+    CREDIT_CARD_TYPES = [:visa, :mastercard, :discover, :american_express,
+                         :diners_club, :jcb, :switch, :solo, :dankort,
+                         :maestro, :forbrugsforeningen, :laser].freeze
 
     class << self
       def credit_card(*types)