diff --git a/lib/services/address/encoding.js b/lib/services/address/encoding.js
index f3f42917..9f304030 100644
--- a/lib/services/address/encoding.js
+++ b/lib/services/address/encoding.js
@@ -143,10 +143,10 @@ Encoding.prototype.encodeAddressCacheValue = function(lastTx, lastBlock, balance
   txApperancesBuffer.writeUInt32BE(txApperances);
   buffer.push(txApperancesBuffer);
 
-  var txidBuffer = new Buffer(lastTx);
+  var txidBuffer = new Buffer(lastTx, 'hex');
   buffer.push(txidBuffer);
 
-  var blkBuffer = new Buffer(lastBlock);
+  var blkBuffer = new Buffer(lastBlock, 'hex');
   buffer.push(blkBuffer);
 
   return Buffer.concat(buffer);