diff --git a/rafthttp/streamer.go b/rafthttp/streamer.go
index f7fe08b5b..fa788a3dc 100644
--- a/rafthttp/streamer.go
+++ b/rafthttp/streamer.go
@@ -34,7 +34,7 @@ import (
 )
 
 const (
-	streamBufSize = 1024
+	streamBufSize = 4096
 )
 
 type WriteFlusher interface {