diff --git a/AddressBook.sol b/AddressBook.sol
index 4c9792d..05a7cde 100644
--- a/AddressBook.sol
+++ b/AddressBook.sol
@@ -1,8 +1,8 @@
-// SPDX-License-Identifier: MIT use this instead ( // SPDX-License-Identifier: GPL-3.0 )
-pragma solidity ^0.8.8;
-
-import "@openzeppelin/contracts/access/Ownable.sol";
+// SPDX-License-Identifier: MIT 
+pragma solidity ^0.8.20;
 
+pragma solidity >=0.8.12;
+import "https://github.com/OpenZeppelin/openzeppelin-solidity/blob/master/contracts/access/Ownable2Step.sol";
 contract AddressBook is Ownable(msg.sender) {
     // Define a private salt value for internal use
     string private salt = "value"; 
@@ -26,47 +26,3 @@ contract AddressBook is Ownable(msg.sender) {
 
     // Custom error for when a contact is not found
     error ContactNotFound(uint id);
-
-    // 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
-        contacts.push(Contact(nextId, firstName, lastName, phoneNumbers));
-        // Map the ID of the new contact to its index in the array
-        idToIndex[nextId] = contacts.length - 1;
-        // Increment the nextId for the next contact
-        nextId++;
-    }
-
-    // Function to delete a contact by its ID
-    function deleteContact(uint id) external onlyOwner {
-        // Get the index of the contact to be deleted
-        uint index = idToIndex[id];
-        // Check if the index is valid and if the contact with the provided ID exists
-        if (index >= contacts.length || contacts[index].id != id) revert ContactNotFound(id);
-
-        // Replace the contact to be deleted with the last contact in the array
-        contacts[index] = contacts[contacts.length - 1];
-        // Update the index mapping for the moved contact
-        idToIndex[contacts[index].id] = index;
-        // Remove the last contact from the array
-        contacts.pop();
-        // Delete the mapping entry for the deleted contact ID
-        delete idToIndex[id];
-    }
-
-    // Function to retrieve a contact by its ID
-    function getContact(uint id) external view returns (Contact memory) {
-        // Get the index of the contact
-        uint index = idToIndex[id];
-        // Check if the index is valid and if the contact with the provided ID exists
-        if (index >= contacts.length || contacts[index].id != id) revert ContactNotFound(id);
-        // Return the contact details
-        return contacts[index];
-    }
-
-    // Function to retrieve all contacts
-    function getAllContacts() external view returns (Contact[] memory) {
-        // Return the array of all contacts
-        return contacts;
-    }
-}