diff --git a/lib/client.js b/lib/client.js
index 56bbec6..af5c4bf 100644
--- a/lib/client.js
+++ b/lib/client.js
@@ -17,6 +17,7 @@ module.exports = function(options) {
     };
   }
 
+  opts.httpAuth=options.auth || null;
   opts.log = options.log || null;
 
   return new elasticsearch.Client(opts);