diff --git a/app/Frontend/ScheduledConference/Pages/Register.php b/app/Frontend/ScheduledConference/Pages/Register.php
index dbf87883..9486dad8 100644
--- a/app/Frontend/ScheduledConference/Pages/Register.php
+++ b/app/Frontend/ScheduledConference/Pages/Register.php
@@ -98,7 +98,7 @@ public function rules()
         ];
 
         $rules['selfAssignRoles'] = [
-            'array',
+            'array', 'required',
         ];
 
         return $rules;