diff --git a/app/Classes/Modules/Bookings/Services/GeneratesBookingMarking.php b/app/Classes/Modules/Bookings/Services/GeneratesBookingMarking.php
index 3e58e945..72f921a6 100644
--- a/app/Classes/Modules/Bookings/Services/GeneratesBookingMarking.php
+++ b/app/Classes/Modules/Bookings/Services/GeneratesBookingMarking.php
@@ -24,7 +24,7 @@ class GeneratesBookingMarking
      */
     public function execute(): int {
 
-        $marking = mt_rand(20000, 99999);
+        $marking = mt_rand(100000, 999999);
         return !$this->bookingMarkingExists->execute($marking) ? $marking : self::execute();
     }