diff --git a/index.js b/index.js
index 4fffd846..baefb894 100644
--- a/index.js
+++ b/index.js
@@ -1,7 +1,7 @@
 
 const app = require('./app'),
     port = ( process.env.PORT || 3100 ),
-    host = ( process.env.HOST || 'localhost' );
+    host = ( process.env.HOST || undefined );
 
 /** run server on the default setup (single core) **/
 console.log( `pelias is now running on ${host}:${port}` );