diff --git a/client/main.go b/client/main.go
index 9bae33a..3c787ff 100644
--- a/client/main.go
+++ b/client/main.go
@@ -26,7 +26,7 @@ const (
 	// maximum supported smux version
 	maxSmuxVer = 2
 	// stream copy buffer size
-	bufSize = 32768
+	bufSize = 4096
 )
 
 // VERSION is injected by buildflags
diff --git a/server/main.go b/server/main.go
index 3feba5f..5da2399 100644
--- a/server/main.go
+++ b/server/main.go
@@ -29,7 +29,7 @@ const (
 	// maximum supported smux version
 	maxSmuxVer = 2
 	// stream copy buffer size
-	bufSize = 32768
+	bufSize = 4096
 )
 
 // VERSION is injected by buildflags