diff --git a/app/models/sales_log.rb b/app/models/sales_log.rb
index 7977972a1..5a616007e 100644
--- a/app/models/sales_log.rb
+++ b/app/models/sales_log.rb
@@ -13,8 +13,8 @@ class SalesLog < Log
   STATUS = { "not_started" => 0, "in_progress" => 1, "completed" => 2 }.freeze
   enum status: STATUS
 
-  OPTIONAL_FIELDS = []
-  
+  OPTIONAL_FIELDS = [].freeze
+
   def startdate
     saledate
   end