diff --git a/projects/challenge/smart_contracts/personal_vault/contract.py b/projects/challenge/smart_contracts/personal_vault/contract.py
index d1e6cf8..5e78538 100644
--- a/projects/challenge/smart_contracts/personal_vault/contract.py
+++ b/projects/challenge/smart_contracts/personal_vault/contract.py
@@ -14,27 +14,27 @@
 class PersonalVault(ARC4Contract):
     def __init__(self) -> None:
         self.balance = LocalState(UInt64)
-
+    
     @arc4.baremethod(allow_actions=["OptIn"])
     def opt_in_to_app(self) -> None:
         self.balance[Txn.sender] = UInt64(0)
-
+    
     @arc4.abimethod()
     def deposit(self, ptxn: gtxn.PaymentTransaction) -> UInt64:
         assert ptxn.amount > 0, "Deposit amount must be greater than 0"
         assert (
-            ptxn.receiver == Global.current_application_id
+            ptxn.receiver == Global.current_application_address
         ), "Deposit receiver must be the contract address"
         assert ptxn.sender == Txn.sender, "Deposit sender must be the caller"
         assert op.app_opted_in(
-            Txn.sender, Global.current_application_address
+            Txn.sender, Global.current_application_id
         ), "Deposit sender must opt-in to the app first."
 
         self.balance[Txn.sender] += ptxn.amount
         user_balance = self.balance[Txn.sender]
 
         return user_balance
-
+    
     @arc4.abimethod(allow_actions=["CloseOut"])
     def withdraw(self) -> UInt64:
         userBalance = self.balance[Txn.sender]
@@ -47,3 +47,4 @@ def withdraw(self) -> UInt64:
         ).submit()
 
         return userBalance
+