diff --git a/src/contracts/NFT.ts b/src/contracts/NFT.ts
index 731c8585..da16a432 100644
--- a/src/contracts/NFT.ts
+++ b/src/contracts/NFT.ts
@@ -722,7 +722,7 @@ export class Nft extends SmartContract {
 
     const nftContract = this.getContract(nftAddress)
 
-    const keyHash = ethers.utils.keccak256(ethers.utils.toUtf8Bytes(key))
+    const keyHash = ethers.utils.keccak256(key)
     const valueHex = ethers.utils.hexlify(ethers.utils.toUtf8Bytes(value))
 
     const estGas = await nftContract.estimateGas.setNewData(keyHash, valueHex)
diff --git a/test/unit/Nft.test.ts b/test/unit/Nft.test.ts
index d477942d..6195c5b7 100644
--- a/test/unit/Nft.test.ts
+++ b/test/unit/Nft.test.ts
@@ -674,7 +674,7 @@ describe('NFT', () => {
   })
 
   it('#setData - should FAIL to set a value into 725Y standard, if Caller has NOT store updater permission', async () => {
-    const key = 'KEY'
+    const key = '0x1234'
     const data = 'NewData'
     assert(
       (await nftDatatoken.getNftPermissions(nftAddress, await user1.getAddress()))
@@ -690,7 +690,7 @@ describe('NFT', () => {
   })
 
   it('#setData - should set a value into 725Y standard, if Caller has store updater permission', async () => {
-    const key = 'KEY'
+    const key = '0x1234'
     const data = 'NewData'
 
     // add store updater permission