diff --git a/lib/explorer.js b/lib/explorer.js
index 61466e8c1..5c4662db1 100644
--- a/lib/explorer.js
+++ b/lib/explorer.js
@@ -104,7 +104,7 @@ module.exports = {
         return cb(body);
       });
     } else {
-      client.command([{method:'getblockhash', parameters: [height]}], function(err, response){
+      client.command([{method:'getblockhash', parameters: [parseInt(height)]}], function(err, response){
         if(err){console.log('Error: ', err); }
         else{
           if(response[0].name == 'RpcError'){