diff --git a/README.md b/README.md
index c55eb07..4789087 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,8 @@ Currently only binary ROP-chains are supported, hence no support for using this
 
 You must specify the "sysver={val}" URL parameter for pages using this codebase, for selecting your Wii U system-version:
 * "532": 5.3.2
-* "550": 5.5.0
+* "540": 5.4.0
+* "550": 5.5.0 / 5.5.1
 
 # Usage
 
diff --git a/wiiu_browserhax_common.php b/wiiu_browserhax_common.php
index 7064348..e6df58d 100644
--- a/wiiu_browserhax_common.php
+++ b/wiiu_browserhax_common.php
@@ -12,6 +12,10 @@ if(isset($_REQUEST['sysver']))
 	{
 		$sysver = 532;
 	}
+	else if($_REQUEST['sysver']==="540")
+	{
+		$sysver = 540;
+	}
 	else if($_REQUEST['sysver']==="550")
 	{
 		$sysver = 550;
@@ -20,7 +24,10 @@ if(isset($_REQUEST['sysver']))
 
 if($sysver===-1)die("The system-version must be specified via an URL parameter.");
 
-require_once("wiiuhaxx_rop_sysver_$sysver.php");
+$filesysver = $sysver;
+if($filesysver == 540)$filesysver = 532;
+
+require_once("wiiuhaxx_rop_sysver_$filesysver.php");
 
 if(!isset($ropchainselect))$ropchainselect = -1;
 if($ropchainselect == -1)