diff --git a/README.md b/README.md
index 16fec2a..e15b806 100644
--- a/README.md
+++ b/README.md
@@ -24,5 +24,8 @@ main();
 
 ## Document
 
+- [TSDoc](http://chirimen.org/node-web-i2c/)
+
+## Reference
+
 - [Web I2C API for W3C Draft](http://browserobo.github.io/WebI2C)
-- [documentation for node-web-i2c](http://chirimen.org/node-web-i2c/)