diff --git a/README.md b/README.md
index 09b9d1a6..23f48426 100644
--- a/README.md
+++ b/README.md
@@ -25,6 +25,7 @@ export default DS.Model.extend(Validator,{
   name: DS.attr('string'),
   email: DS.attr('string'),
 
+  legacyCode: DS.attr('string'),
   lotteryNumber: DS.attr('number'),
 
   otherFakes: DS.hasMany('other-model'),
@@ -38,6 +39,9 @@ export default DS.Model.extend(Validator,{
       presence: true,
       email: true
     },
+    legacyCode:{
+      format: {with: /^[a-zA-Z]+$/}
+    },
     lotteryNumber: {
       numericality: true
     },