diff --git a/Classes/Service/MailHandler.php b/Classes/Service/MailHandler.php
index 55995745..4924439e 100644
--- a/Classes/Service/MailHandler.php
+++ b/Classes/Service/MailHandler.php
@@ -24,7 +24,8 @@
 class MailHandler implements SingletonInterface
 {
     protected array $pluginSettings = [];
-    protected Cart $cart;
+
+    protected ?Cart $cart = null;
 
     protected string $buyerEmailName = '';
     protected string $buyerEmailFrom = '';
diff --git a/Documentation/guides.xml b/Documentation/guides.xml
index a3484368..9bdf8876 100644
--- a/Documentation/guides.xml
+++ b/Documentation/guides.xml
@@ -11,7 +11,7 @@
                interlink-shortcode="extcode/cart"
     />
     <project title="Cart"
-             release="11.4.5"
+             release="11.4.6"
              version="11.4"
              copyright="2018 - 2025"
     />
diff --git a/ext_emconf.php b/ext_emconf.php
index 34440c72..1b3c5b39 100644
--- a/ext_emconf.php
+++ b/ext_emconf.php
@@ -4,7 +4,7 @@
     'title' => 'Cart',
     'description' => 'Shopping Cart(s) for TYPO3',
     'category' => 'plugin',
-    'version' => '11.4.5',
+    'version' => '11.4.6',
     'state' => 'stable',
     'author' => 'Daniel Gohlke',
     'author_email' => 'ext@extco.de',