diff --git a/src/Components/Checkout/Service/WidgetService.php b/src/Components/Checkout/Service/WidgetService.php
index 37a0dba..212547f 100644
--- a/src/Components/Checkout/Service/WidgetService.php
+++ b/src/Components/Checkout/Service/WidgetService.php
@@ -237,7 +237,7 @@ protected function getLineItem($lineItem, Context $context): LineItem
                 ->setGtin($product->getEan());
 
             if ($product->getDescription()) {
-                $billieLineItem->setDescription(substr($product->getDescription(), 0, 255));
+                $billieLineItem->setDescription(mb_substr($product->getDescription(), 0, 255, 'utf-8'));
             }
         }