diff --git a/src/GatewayChecksum.php b/src/GatewayChecksum.php
index b12b7f2..68e44a8 100644
--- a/src/GatewayChecksum.php
+++ b/src/GatewayChecksum.php
@@ -10,9 +10,9 @@
 
 class GatewayChecksum
 {
-    private const VERSION = "P8.31";
+    private const VERSION = "P8.32";
     public static $checksum = "";
-    public static $baseChecksum = "f84d9bfd287a90f4cbdad972c4c8f5c8";
+    public static $baseChecksum = "ec2b4366e353189f0240a635c507575c";
     public static $versionNo = GatewayChecksum::VERSION;
 
 //////////////////////////////////////////////////////////////////////
diff --git a/src/GatewayResponse.php b/src/GatewayResponse.php
index ed6980f..197e428 100644
--- a/src/GatewayResponse.php
+++ b/src/GatewayResponse.php
@@ -577,4 +577,8 @@ static function APPLE_PAY_MERCHANT_TOKEN_ID() {
         return "applePayMerchantTokenId";
     }
 
+    static function _3D_MPI() {
+        return "_3D_MPI";
+    }
+
 }