diff --git a/lib/wallet.js b/lib/wallet.js
index 879373c2..28649361 100644
--- a/lib/wallet.js
+++ b/lib/wallet.js
@@ -24,7 +24,7 @@ function httpError (msg, code) {
 }
 
 function computeSeed (masterSeed) {
-  return hkdf(masterSeed, 32, {salt: 'lamassu-server-salt', info: 'wallet-seed'}).toString('hex')
+  return hkdf(masterSeed, 32, {salt: 'lamassu-server-salt', info: 'wallet-seed'})
 }
 
 function fetchWallet (settings, cryptoCode) {