diff --git a/Related-Projects.md b/Related-Projects.md
index 977cba4..511b5c7 100644
--- a/Related-Projects.md
+++ b/Related-Projects.md
@@ -10,6 +10,7 @@
 * [mruby-cfunc](https://github.com/mobiruby/mruby-cfunc) libffi binding by [masuidrive](https://github.com/masuidrive)
 * [mruby-cocoa](https://github.com/mobiruby/mruby-cocoa) Cocoa binding by [masuidrive](https://github.com/masuidrive)
 * [mruby-cgroup](https://github.com/matsumoto-r/mruby-cgroup) cgroups binding by [matsumoto_r](https://github.com/matsumoto-r)
+* [mruby-config](https://github.com/matsumoto-r/mruby-config) configuration values between C and RUby by [matsumoto_r](https://github.com/matsumoto-r)
 * [mruby-core-ext](https://github.com/skandhas/mruby-core-ext) mruby core extensions by [skandhas](https://github.com/skandhas)
 * [mruby-curl](https://github.com/mattn/mruby-curl) [libcurl](http://curl.haxx.se/) binding by [mattn](https://github.com/mattn)
 * [mruby-digest](https://github.com/iij/mruby-digest) MD5, RMD160, SHA1, SHA256, SHA384, SHA512 and HMAC Digests by [iij](https://github.com/iij)