diff --git a/AddressBook.sol b/AddressBook.sol
index 4c9792d..9164fce 100644
--- a/AddressBook.sol
+++ b/AddressBook.sol
@@ -1,9 +1,9 @@
-// SPDX-License-Identifier: MIT use this instead ( // SPDX-License-Identifier: GPL-3.0 )
+// SPDX-License-Identifier: GPL-3.0
 pragma solidity ^0.8.8;
 
 import "@openzeppelin/contracts/access/Ownable.sol";
 
-contract AddressBook is Ownable(msg.sender) {
+contract AddressBook is Ownable {
     // Define a private salt value for internal use
     string private salt = "value"; 
 
@@ -27,6 +27,9 @@ contract AddressBook is Ownable(msg.sender) {
     // Custom error for when a contact is not found
     error ContactNotFound(uint id);
 
+    // 🔧 FIX: Constructor eklendi - Ownable için gerekli
+    constructor() Ownable(msg.sender) {}
+
     // Function to add a new contact
     function addContact(string calldata firstName, string calldata lastName, uint[] calldata phoneNumbers) external onlyOwner {
         // Create a new contact with the provided details and add it to the contacts array