diff --git a/src/Database/ModelTraits/UserOrganisations.php b/src/Database/ModelTraits/UserOrganisations.php
index 4a02c9f..dd2ea84 100644
--- a/src/Database/ModelTraits/UserOrganisations.php
+++ b/src/Database/ModelTraits/UserOrganisations.php
@@ -124,7 +124,7 @@ trait UserOrganisations {
     }
 
 
-    public function bootUserOrganisations()
+    static public function bootUserOrganisations()
     {
         static::deleting(function ($user) {
             if (!$user->deleteUserOrganisations($user->isForceDeleting())) {