diff --git a/README.md b/README.md
index 898f4b531..976797310 100644
--- a/README.md
+++ b/README.md
@@ -25,7 +25,7 @@ Underlying technology is a distributed tracing system.
 # Document
 [![EN doc](https://img.shields.io/badge/document-English-blue.svg)](docs/README.md) [![cn doc](https://img.shields.io/badge/document-中文-blue.svg)](docs/README_ZH.md)
 
-# Architecture
+# 5.x Architecture
 <img src="https://skywalkingtest.github.io/page-resources/5.0/architecture.png"/>
 
 # Code of conduct
diff --git a/README_ZH.md b/README_ZH.md
index ca0401aba..6c7c2b504 100644
--- a/README_ZH.md
+++ b/README_ZH.md
@@ -28,7 +28,7 @@ Apache SkyWalking | [English](README.md)
 [![EN doc](https://img.shields.io/badge/document-English-blue.svg)](docs/README.md) [![cn doc](https://img.shields.io/badge/-中文-blue.svg)](docs/README_ZH.md)
 
 
-# Architecture
+# 5.x Architecture
 <img src="https://skywalkingtest.github.io/page-resources/5.0/architecture.png"/>
 
 # code of conduct