diff --git a/README.md b/README.md
index 0b46d48c..f8dd4ddd 100644
--- a/README.md
+++ b/README.md
@@ -135,7 +135,7 @@ If flash using serial port rather than USB, different USB2TTL chips support diff
 
 ## Chip Manual
 
-**Chip Reference Manual** and **Chip Data Manual** are listed on [document](https://dev.bouffalolab.com/document)
+**Chip Reference Manual** and **Chip Data Manual** are listed on [document](https://github.com/bouffalolab/bl_docs)
 
 ## Documentation Tutorial
 
diff --git a/README_zh.md b/README_zh.md
index 22371ebd..051aad60 100644
--- a/README_zh.md
+++ b/README_zh.md
@@ -133,7 +133,7 @@ make flash CHIP=chip_name CPU_ID=m0 COMX=xxx # chip_name should be bl602/bl702/b
 
 # 芯片手册
 
-芯片数据手册和参考手册见 [文档](https://dev.bouffalolab.com/document)。
+芯片数据手册和参考手册见 [文档](https://github.com/bouffalolab/bl_docs)。
 
 # 文档教程