diff --git a/src/Ramcar/DeliveryStatus.php b/src/Ramcar/DeliveryStatus.php
index 7d464444..b4d06871 100644
--- a/src/Ramcar/DeliveryStatus.php
+++ b/src/Ramcar/DeliveryStatus.php
@@ -6,8 +6,8 @@ class DeliveryStatus extends NameValue
 {
     const RIDER_ASSIGN             = 'rider_assign';
     const REQUEUE                  = 'requeue';
-    const RIDER_ACCEPT             = 'accept';
-    const RIDER_ARRIVE             = 'arrive';
+    const RIDER_ACCEPT             = 'rider_accept';
+    const RIDER_ARRIVE             = 'rider_arrive';
     const RIDER_EDIT               = 'rider_edit';
     const RIDER_DEPART_HUB         = 'rider_depart_hub';
     const RIDER_ARRIVE_HUB_PRE_JO  = 'rider_arrive_hub_pre_jo';