diff --git a/Related-Projects.md b/Related-Projects.md
index 0373a11..b0deb21 100644
--- a/Related-Projects.md
+++ b/Related-Projects.md
@@ -12,6 +12,7 @@
 * [mruby-httprequest](https://github.com/matsumoto-r/mruby-httprequest) simple http request using [mruby-http](https://github.com/mattn/mruby-http) by [matsumoto_r](https://github.com/matsumoto-r)
 * [mruby-growthforecast](https://github.com/matsumoto-r/mruby-growthforecast) [GrowthForecast](http://kazeburo.github.com/GrowthForecast/) client using [mruby-httprequest](https://github.com/matsumoto-r/mruby-httprequest) by [matsumoto_r](https://github.com/matsumoto-r)
 * [mruby-zabbix](https://github.com/matsumoto-r/mruby-zabbix) zabbix 2.0 API client using [mruby-httprequest](https://github.com/matsumoto-r/mruby-httprequest) and [mruby-json](https://github.com/mattn/mruby-json) by [matsumoto_r](https://github.com/matsumoto-r)
+* [mruby-oauth](https://github.com/matsumoto-r/mruby-oauth) OAuth binding by [matsumoto_r](https://github.com/matsumoto-r)
 * [mruby-curl](https://github.com/mattn/mruby-curl) [libcurl](http://curl.haxx.se/) binding by [mattn](https://github.com/mattn)
 * [mruby-v8](https://github.com/mattn/mruby-v8) javascript([v8](https://code.google.com/p/v8/)) binding by [mattn](https://github.com/mattn)
 * [mruby-syslog](https://github.com/iij/mruby-syslog) syslog(3) binding by [iij](https://github.com/iij)