diff --git a/partner-masterpulsa-voucher.js b/partner-masterpulsa-voucher.js
index d8eab93..91b33d3 100644
--- a/partner-masterpulsa-voucher.js
+++ b/partner-masterpulsa-voucher.js
@@ -280,5 +280,4 @@ exports.calculateSignature = calculateSignature;
 exports.parsePaymentResponse = parsePaymentResponse;
 exports.getErrorCode = getErrorCode;
 exports.getST24ResponseCode = getST24ResponseCode;
-exports.generateSN = generateSN;
 exports.generateDt = generateDt;