diff --git a/backend/internal/ktmtrainbot/backgroundbookingjob.go b/backend/internal/ktmtrainbot/backgroundbookingjob.go
index bc13195..91dfd30 100644
--- a/backend/internal/ktmtrainbot/backgroundbookingjob.go
+++ b/backend/internal/ktmtrainbot/backgroundbookingjob.go
@@ -200,7 +200,7 @@ func (env *Env) startBooking(job *Booking, username string, password string, cre
 	contact := job.Contact
 	reverse := job.BackToSg
 
-	threadCount := 10
+	threadCount := 15
 	for i := 0; i < threadCount; i++ {
 		time.Sleep(time.Millisecond * 100)
 		go func() {