diff --git a/admin/setup_mvp.php b/admin/setup_mvp.php
index 292631b..17d56d5 100644
--- a/admin/setup_mvp.php
+++ b/admin/setup_mvp.php
@@ -94,8 +94,8 @@ if ($action == 'update_vat_refund_threshold') {
     error_log("POST data: " . print_r($_POST, true));
     
     $threshold_config = array(
-        'refund_threshold' => GETPOST('vat_refund_threshold', 'float'),
-        'refund_threshold_enabled' => GETPOST('vat_refund_threshold_enabled', 'int')
+        'refund_threshold' => (float)$_POST['vat_refund_threshold'],
+        'refund_threshold_enabled' => (int)$_POST['vat_refund_threshold_enabled']
     );
     
     // Debug: Log the received values