diff --git a/plugins/schuweb_sitemap/kunena/script.php b/plugins/schuweb_sitemap/kunena/script.php
index 083fa54..9846d2e 100644
--- a/plugins/schuweb_sitemap/kunena/script.php
+++ b/plugins/schuweb_sitemap/kunena/script.php
@@ -11,6 +11,7 @@
 
 defined('_JEXEC') or die;
 
+use Joomla\CMS\Factory;
 use Joomla\CMS\Installer\InstallerScript;
 
 /**
diff --git a/plugins/schuweb_sitemap/weblinks/script.php b/plugins/schuweb_sitemap/weblinks/script.php
index e391ad1..28153e6 100644
--- a/plugins/schuweb_sitemap/weblinks/script.php
+++ b/plugins/schuweb_sitemap/weblinks/script.php
@@ -11,6 +11,7 @@
 
 defined('_JEXEC') or die;
 
+use Joomla\CMS\Factory;
 use Joomla\CMS\Installer\InstallerScript;
 
 /**
diff --git a/plugins/schuweb_sitemap/zoo/script.php b/plugins/schuweb_sitemap/zoo/script.php
index 3f14dfc..4ca2232 100644
--- a/plugins/schuweb_sitemap/zoo/script.php
+++ b/plugins/schuweb_sitemap/zoo/script.php
@@ -11,6 +11,7 @@
 
 defined('_JEXEC') or die;
 
+use Joomla\CMS\Factory;
 use Joomla\CMS\Installer\InstallerScript;
 
 /**