diff --git a/pkg/database/timetable.go b/pkg/database/timetable.go
index 878a8e1..3f0535a 100644
--- a/pkg/database/timetable.go
+++ b/pkg/database/timetable.go
@@ -16,7 +16,7 @@ type Stop struct {
 type Service struct {
 	TransactionType   string    `json:"transactionType,omitempty"`
 	StpIndicator      string    `json:"stpIndicator,omitempty"`
-	Vstp              string    `json:"vstp"`
+	Vstp              bool      `json:"vstp"`
 	Operator          string    `json:"operator,omitempty"`
 	TrainUid          string    `json:"trainUid,omitempty"`
 	Headcode          string    `json:"headcode,omitempty"`