diff --git a/models/order/order.go b/models/order/order.go
index ce566d1..efb1f3a 100644
--- a/models/order/order.go
+++ b/models/order/order.go
@@ -17,10 +17,11 @@ import (
 
 type Order struct {
 	utils.AbstractObject
-	ExecutionsID string                                `json:"executions_id" bson:"executions_id" validate:"required"`
-	Status       enum.CompletionStatus                 `json:"status" bson:"status" default:"0"`
-	Purchases    []*purchase_resource.PurchaseResource `json:"purchases" bson:"purchases"`
-	Bookings     []*booking.Booking                    `json:"bookings" bson:"bookings"`
+	ExecutionsID        string                                `json:"executions_id" bson:"executions_id" validate:"required"`
+	SchedulingSessionID string                                `json:"scheduling_session_id,omitempty" bson:"scheduling_session_id,omitempty"`
+	Status              enum.CompletionStatus                 `json:"status" bson:"status" default:"0"`
+	Purchases           []*purchase_resource.PurchaseResource `json:"purchases" bson:"purchases"`
+	Bookings            []*booking.Booking                    `json:"bookings" bson:"bookings"`
 
 	Billing map[pricing.BillingStrategy][]*booking.Booking `json:"billing" bson:"billing"`
 }