diff --git a/contracts/version/Version.sol b/contracts/version/Version.sol
index 70f9988..90a81ba 100644
--- a/contracts/version/Version.sol
+++ b/contracts/version/Version.sol
@@ -6,10 +6,9 @@ pragma solidity 0.8.27;
  */
 contract Version {
     /**
-     * @dev Returns the address of the current owner.
+     * @dev Returns the version of the SFC contract
      */
     function version() public pure returns (bytes3) {
-        // version 3.0.5
-        return "305";
+        return 0x040000; // version 4.0.0
     }
 }
diff --git a/test/SFC.ts b/test/SFC.ts
index 87bbe3e..c3351c3 100644
--- a/test/SFC.ts
+++ b/test/SFC.ts
@@ -127,7 +127,7 @@ describe('SFC', () => {
     });
 
     it('Should succeed and return version of the current implementation', async function () {
-      expect(await this.sfc.version()).to.equal(ethers.hexlify(ethers.toUtf8Bytes('305')));
+      expect(await this.sfc.version()).to.equal('0x040000');
     });
   });