diff --git a/src/GiftVoucher.php b/src/GiftVoucher.php
index 5487d47..4416b82 100755
--- a/src/GiftVoucher.php
+++ b/src/GiftVoucher.php
@@ -135,7 +135,7 @@ private function _registerEventHandlers()
         Event::on(Sites::class, Sites::EVENT_AFTER_SAVE_SITE, [$this->getVoucherTypes(), 'afterSaveSiteHandler']);
         Event::on(Sites::class, Sites::EVENT_AFTER_SAVE_SITE, [$this->getVouchers(), 'afterSaveSiteHandler']);
         // Event::on(Order::class, Order::EVENT_AFTER_ORDER_PAID, [$this->getCodes(), 'handlePaidOrder']);
-        Event::on(Order::class, Order::EVENT_AFTER_COMPLETE_ORDER, [$this->getCodes(), 'handleCompletedOrder']);
+        Event::on(Order::class, Order::EVENT_BEFORE_COMPLETE_ORDER, [$this->getCodes(), 'handleCompletedOrder']);
     }
 
     private function _registerElementTypes()