diff --git a/agent/app/api/v2/terminal.go b/agent/app/api/v2/terminal.go
index 61372620349a..16685edac1c3 100644
--- a/agent/app/api/v2/terminal.go
+++ b/agent/app/api/v2/terminal.go
@@ -228,8 +228,8 @@ func wshandleError(ws *websocket.Conn, err error) bool {
 }
 
 var upGrader = websocket.Upgrader{
-	ReadBufferSize:  1024,
-	WriteBufferSize: 1024 * 1024 * 10,
+	ReadBufferSize:  4096,
+	WriteBufferSize: 16384,
 	CheckOrigin: func(r *http.Request) bool {
 		return true
 	},
diff --git a/core/app/api/v2/host.go b/core/app/api/v2/host.go
index 33312855d4d1..621f6d0df7ec 100644
--- a/core/app/api/v2/host.go
+++ b/core/app/api/v2/host.go
@@ -327,8 +327,8 @@ func (b *BaseApi) WsSsh(c *gin.Context) {
 }
 
 var upGrader = websocket.Upgrader{
-	ReadBufferSize:  1024,
-	WriteBufferSize: 1024 * 1024 * 10,
+	ReadBufferSize:  4096,
+	WriteBufferSize: 16384,
 	CheckOrigin: func(r *http.Request) bool {
 		return true
 	},