diff --git a/script/IPCM.s.sol b/script/IPCM.s.sol
index a83c9cd..a353b5f 100644
--- a/script/IPCM.s.sol
+++ b/script/IPCM.s.sol
@@ -1,5 +1,5 @@
-// SPDX-License-Identifier: UNLICENSED
-pragma solidity ^0.8.13;
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.22;
 
 import {Script, console} from "forge-std/Script.sol";
 import {IPCM} from "../src/IPCM.sol";
@@ -12,7 +12,7 @@ contract IPCMScript is Script {
     function run() public {
         vm.startBroadcast();
 
-        ipcm = new IPCM();
+        ipcm = new IPCM(msg.sender);
 
         vm.stopBroadcast();
     }
diff --git a/src/IPCM.sol b/src/IPCM.sol
index 940b4fa..8067ee7 100644
--- a/src/IPCM.sol
+++ b/src/IPCM.sol
@@ -1,14 +1,22 @@
-// SPDX-License-Identifier: UNLICENSED
-pragma solidity ^0.8.13;
+// SPDX-License-Identifier: MIT
+// Compatible with OpenZeppelin Contracts ^5.0.0
+pragma solidity ^0.8.22;
 
-contract IPCM {
-    uint256 public number;
+import {Ownable} from "../lib/openzeppelin-contracts/contracts/access/Ownable.sol";
 
-    function setNumber(uint256 newNumber) public {
-        number = newNumber;
+contract IPCM is Ownable {
+    constructor(address owner) Ownable(owner) {}
+
+    string private cidMapping;
+
+    event MappingUpdated(string value);
+
+    function setValue(string memory value) public onlyOwner {
+        cidMapping = value;
+        emit MappingUpdated(value);
     }
 
-    function increment() public {
-        number++;
+    function getValue() public view returns (string memory) {
+        return cidMapping;
     }
 }
diff --git a/test/IPCM.t.sol b/test/IPCM.t.sol
index 0be02cb..95db2b4 100644
--- a/test/IPCM.t.sol
+++ b/test/IPCM.t.sol
@@ -1,13 +1,42 @@
-// SPDX-License-Identifier: UNLICENSED
-pragma solidity ^0.8.13;
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.22;
 
 import {Test, console} from "forge-std/Test.sol";
 import {IPCM} from "../src/IPCM.sol";
 
 contract IPCMTest is Test {
     IPCM public ipcm;
+    address owner = address(1);
+    string testCid = "QmTest123";
 
     function setUp() public {
-        ipcm = new IPCM();
+        ipcm = new IPCM(owner);
+        vm.startPrank(owner);
+    }
+
+    function testSetValue() public {
+        ipcm.setValue(testCid);
+        assertEq(ipcm.getValue(), testCid);
+    }
+
+    function testOnlyOwnerCanSetValue() public {
+        vm.stopPrank();
+        vm.startPrank(address(2));
+        vm.expectRevert();
+        ipcm.setValue(testCid);
+    }
+
+    function testEmitsEvent() public {
+        emit IPCM.MappingUpdated(testCid);
+        ipcm.setValue(testCid);
+    }
+
+    function testGetValue() public {
+        string memory emptyValue = ipcm.getValue();
+        assertEq(emptyValue, "");
+
+        ipcm.setValue(testCid);
+        string memory newValue = ipcm.getValue();
+        assertEq(newValue, testCid);
     }
 }