diff --git a/src/aquarius/Aquarius.ts b/src/aquarius/Aquarius.ts
index 8a757d2..dbaa6a8 100644
--- a/src/aquarius/Aquarius.ts
+++ b/src/aquarius/Aquarius.ts
@@ -3,7 +3,6 @@ import { DDO } from '../ddo/DDO'
 import DID from '../ocean/DID'
 import { Logger } from '../utils'
 import { WebServiceConnector } from '../ocean/utils/WebServiceConnector'
-import { Account } from '../squid'
 
 const apiPath = '/api/v1/aquarius/assets/ddo'
 
@@ -250,7 +249,6 @@ export class Aquarius {
         return result
     }
 
-    
     /**
      * Transfer ownership of a DDO
      * @param  {DID | string} did DID of the asset to update.
@@ -259,11 +257,23 @@ export class Aquarius {
      * @param  {String} signature Signature using updated field to verify that the consumer has rights
      * @return {Promise<String>} Result.
      */
-    public async transferOwnership(did: DID | string, newOwner: string, updated: string, signature: string): Promise<String> {
+    public async transferOwnership(
+        did: DID | string,
+        newOwner: string,
+        updated: string,
+        signature: string
+    ): Promise<string> {
         did = did && DID.parse(did)
         const fullUrl = `${this.url}${apiPath}/transferownership/${did.getDid()}`
         const result = await this.fetch
-            .put(fullUrl, JSON.stringify({signature: signature, updated: updated, newowner: newOwner}))
+            .put(
+                fullUrl,
+                JSON.stringify({
+                    signature: signature,
+                    updated: updated,
+                    newowner: newOwner
+                })
+            )
             .then((response: any) => {
                 if (response.ok) {
                     return response.text
@@ -273,9 +283,9 @@ export class Aquarius {
                     response.status,
                     response.statusText
                 )
-                return null 
+                return null
             })
-            
+
             .catch(error => {
                 this.logger.error('Error updating metadata: ', error)
                 return null
diff --git a/src/ocean/OceanAssets.ts b/src/ocean/OceanAssets.ts
index 7a25689..69db15d 100644
--- a/src/ocean/OceanAssets.ts
+++ b/src/ocean/OceanAssets.ts
@@ -429,10 +429,18 @@ export class OceanAssets extends Instantiable {
             newOwner,
             oldOwner
         )
-        //get a signature
-        const signature=await this.ocean.utils.signature.signForAquarius(oldDdo.updated, account)
-        if(signature!=null)
-            await this.ocean.aquarius.transferOwnership(did,newOwner,oldDdo.updated,signature)
+        // get a signature
+        const signature = await this.ocean.utils.signature.signForAquarius(
+            oldDdo.updated,
+            account
+        )
+        if (signature != null)
+            await this.ocean.aquarius.transferOwnership(
+                did,
+                newOwner,
+                oldDdo.updated,
+                signature
+            )
 
         return txReceipt
     }
diff --git a/src/ocean/utils/SignatureUtils.ts b/src/ocean/utils/SignatureUtils.ts
index 23d7beb..2f269ae 100644
--- a/src/ocean/utils/SignatureUtils.ts
+++ b/src/ocean/utils/SignatureUtils.ts
@@ -42,22 +42,27 @@ export class SignatureUtils {
         return this.web3.eth.personal.ecRecover(text, signature)
     }
 
-    public async getHash(message:string): Promise<string> {
-        var hex = ''
-        for(var i=0;i<message.length;i++) {
-            hex += ''+message.charCodeAt(i).toString(16)
+    public async getHash(message: string): Promise<string> {
+        let hex = ''
+        for (let i = 0; i < message.length; i++) {
+            hex += '' + message.charCodeAt(i).toString(16)
         }
-        var hexMessage = "0x" + hex
+        const hexMessage = '0x' + hex
         return hexMessage as string
     }
-    public async signForAquarius(message:string, account:Account): Promise<string> {
-        const hash=await this.getHash(message)
+
+    public async signForAquarius(message: string, account: Account): Promise<string> {
+        const hash = await this.getHash(message)
         const isMetaMask =
             this.web3 &&
             this.web3.currentProvider &&
             (this.web3.currentProvider as any).isMetaMask
         try {
-            return this.web3.eth.personal.sign(hash, account.getId(),account.getPassword())
+            return this.web3.eth.personal.sign(
+                hash,
+                account.getId(),
+                account.getPassword()
+            )
         } catch (e) {
             if (isMetaMask) {
                 throw e
@@ -66,6 +71,5 @@ export class SignatureUtils {
             this.logger.warn(e)
             return null
         }
-        
     }
 }