diff --git a/bsp/swm320/README.md b/bsp/swm320/README.md
index c6960c371ae0b8677f0b70ecc2bcba1742fc5b70..417a7b2ef8f7dd18d515580e0f997b9d0cd169f7 100644
--- a/bsp/swm320/README.md
+++ b/bsp/swm320/README.md
@@ -166,4 +166,4 @@ msh />
 
 * [RT-Thread 文档中心](https://www.rt-thread.org/document/site/)
 
-* [SWM320数据手册](http://www.synwit.cn/support-1/3.html)
+* [SWM320数据手册](https://www.synwit.cn/col.jsp?id=155)