diff --git a/transport/internet/kcp/connection.go b/transport/internet/kcp/connection.go
index 3194af60..7cda9bf3 100644
--- a/transport/internet/kcp/connection.go
+++ b/transport/internet/kcp/connection.go
@@ -62,7 +62,7 @@ func (this *RoundTripInfo) UpdatePeerRTO(rto uint32, current uint32) {
 	this.Lock()
 	defer this.Unlock()
 
-	if current-this.updatedTimestamp < 5000 {
+	if current-this.updatedTimestamp < 3000 {
 		return
 	}