diff --git a/partner-masterpulsa-voucher.js b/partner-masterpulsa-voucher.js
index 8c13f99..b81b306 100644
--- a/partner-masterpulsa-voucher.js
+++ b/partner-masterpulsa-voucher.js
@@ -116,14 +116,13 @@ function rehashRefnum(refnum) {
     var hashed = refnum;
     try {
         hashed = hashed.replace(/A/g, '1').replace(/B/g, '2').replace(/C/g, '3').replace(/D/g, '4').replace(/E/g, '5').replace('/F/g', '6');
+        hashed = hashed.substring(0, 15);
     }
     catch(err) {
+        logger.warn('Gagal rehashRefnum: ' + err);
         hashed = refnum;
     }
     return hashed;
-
-
-
 }
 
 function reportPaymentSuccess(task, response) {