diff --git a/partner-datacell.js b/partner-datacell.js
index 146ba6e..0dc3dd2 100644
--- a/partner-datacell.js
+++ b/partner-datacell.js
@@ -35,7 +35,7 @@ function createPayload(task) {
     };
     
     console.log(payload);
-    return xml(payload);
+    return "<?xml version=\"1.0\" ?>\n" + xml(payload);
 }
 
 function topupRequest(task, retry) {