diff --git a/lib/utils/token-util.js b/lib/utils/token-util.js
index a1d6937..5248756 100644
--- a/lib/utils/token-util.js
+++ b/lib/utils/token-util.js
@@ -5,7 +5,6 @@
  */
 
 const randomBytes = require('crypto').randomBytes;
-const { createHash } = require('../utils/crypto-util');
 
 /**
  * Export `TokenUtil`.
@@ -17,8 +16,15 @@ module.exports = {
    * Generate random token.
    */
 
-  generateRandomToken: async function() {
-    const buffer = randomBytes(256);
-    return createHash({ data: buffer, encoding: 'hex' });
+  generateRandomToken: function() {
+    return new Promise((resolve, reject) => {
+      randomBytes(32, (err, data) => {
+        if (err) {
+          reject(err);
+        } else {
+          resolve(data.toString('hex'));
+        }
+      });
+    });
   }
 };