diff --git a/lib/bcoin/http/rpc.js b/lib/bcoin/http/rpc.js
index a9c4e646..08d43c96 100644
--- a/lib/bcoin/http/rpc.js
+++ b/lib/bcoin/http/rpc.js
@@ -2606,7 +2606,7 @@ RPC.prototype.listreceivedbyaddress = function listreceivedbyaddress(args, callb
 
 RPC.prototype.listsinceblock = function listsinceblock(args, callback) {
   var self = this;
-  var block, conf, out;
+  var block, conf, out, highest;
 
   if (args.help) {
     return callback(new Error('listsinceblock'
@@ -2620,6 +2620,8 @@ RPC.prototype.listsinceblock = function listsinceblock(args, callback) {
     block = utils.revHex(block);
   }
 
+  conf = 0;
+
   if (args.length > 1) {
     conf = Number(args[1]);
     if (!utils.isNumber(conf) || conf < 0)
@@ -2642,6 +2644,13 @@ RPC.prototype.listsinceblock = function listsinceblock(args, callback) {
       utils.forEachSerial(txs, function(tx, next, i) {
         if (tx.height < height)
           return next();
+
+        if (tx.getConfirmations() < conf)
+          return next();
+
+        if (!highest || tx.height > highest)
+          highest = tx;
+
         self._toListTX(tx, function(err, json) {
           if (err)
             return next(err);
@@ -2651,7 +2660,13 @@ RPC.prototype.listsinceblock = function listsinceblock(args, callback) {
       }, function(err) {
         if (err)
           return callback(err);
-        callback(null, out);
+
+        callback(null, {
+          transactions: out,
+          lastblock: highest && highest.block
+            ? utils.revHex(highest.block)
+            : constants.NULL_HASH
+        });
       });
     });
   });