diff --git a/transport/ray/direct.go b/transport/ray/direct.go
index 2594e7d8..a4e446b7 100644
--- a/transport/ray/direct.go
+++ b/transport/ray/direct.go
@@ -9,7 +9,7 @@ import (
 )
 
 const (
-	bufferSize = 128
+	bufferSize = 512
 )
 
 // NewRay creates a new Ray for direct traffic transport.