diff --git a/main.lua b/main.lua
index f200bed..40fc47f 100644
--- a/main.lua
+++ b/main.lua
@@ -46,11 +46,11 @@ function PremiumAccount(cls)
     end
 end
 
-local acct = oop.new(BankAccount, "Kim", 1234)
+local acct = BankAccount("Kim", 1234)
 acct.deposit(100)
 acct.withdraw(30, 1234)
 
-local vip = oop.new(PremiumAccount, "Sam", 9999)
+local vip = PremiumAccount("Sam", 9999)
 vip.monthly_bonus()
 
 local ok, err = pcall(function()