diff --git a/src/script.php b/src/script.php
index 878788d..e11ec38 100644
--- a/src/script.php
+++ b/src/script.php
@@ -21,9 +21,10 @@ defined('_JEXEC') or die;
 
 use Joomla\CMS\Factory;
 use Joomla\CMS\Installer\InstallerAdapter;
+use Joomla\CMS\Installer\InstallerScriptInterface;
 use Joomla\CMS\Log\Log;
 
-class Tpl_MokoonyxInstallerScript
+class Tpl_MokoonyxInstallerScript implements InstallerScriptInterface
 {
     private const MIN_PHP = '8.1.0';
     private const MIN_JOOMLA = '4.4.0';
@@ -87,8 +88,8 @@ class Tpl_MokoonyxInstallerScript
 
     public function postflight(string $type, InstallerAdapter $parent): bool
     {
-        // On install: migrate from MokoCassiopeia if it exists
-        if ($type === 'install') {
+        // On install or update: migrate from MokoCassiopeia if it exists
+        if ($type === 'install' || $type === 'update') {
             $this->migrateFromCassiopeia();
         }