diff --git a/lib/index.js b/lib/index.js
index 71838fc..b0db813 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -23,6 +23,7 @@ const resolveHost = (host) => {
       port: parseInt(RegExp.$2, 10),
     };
   }
+  return {};
 };
 
 const resolveHostList = (str) => {