diff --git a/playground/server.js b/playground/server.js
index 8bc5f30..b263ed9 100644
--- a/playground/server.js
+++ b/playground/server.js
@@ -50,7 +50,7 @@ var mapEventsList = function(events) {
 
 app.use(function(req, res, next) {
   res.header("Access-Control-Allow-Origin", "*");
-  res.header("Access-Control-Allow-Headers", "X-Requested-With");
+  res.header("Access-Control-Allow-Headers", "X-Requested-With, X-Le-Account");
   next();
 });