diff --git a/src/GatewayChecksum.php b/src/GatewayChecksum.php
index c55078b..833f80c 100644
--- a/src/GatewayChecksum.php
+++ b/src/GatewayChecksum.php
@@ -11,8 +11,8 @@
 class GatewayChecksum
 {
     public static $checksum = "";
-    public static $baseChecksum = "0768ad22de7968cf705633bb61297c13";
-    public static $versionNo = "P8.0";
+    public static $baseChecksum = "2317383ab360d498c3abae7e3d0d4709";
+    public static $versionNo = "P9.0";
 
 //////////////////////////////////////////////////////////////////////
 //
diff --git a/src/GatewayResponse.php b/src/GatewayResponse.php
index 6c770c2..0b140ae 100644
--- a/src/GatewayResponse.php
+++ b/src/GatewayResponse.php
@@ -551,4 +551,14 @@ static function _3DSECURE_LOOKUP_REFERENCE_GUID()
         return "_3DSECURE_LOOKUP_REFERENCE_GUID";
     }
 
+    static function UDF01()
+    {
+        return "UDF01";
+    }
+
+    static function UDF02()
+    {
+        return "UDF02";
+    }
+
 }