diff --git a/effectivescala-cn.mo b/effectivescala-cn.mo
index f2d3cfd..a12738e 100644
--- a/effectivescala-cn.mo
+++ b/effectivescala-cn.mo
@@ -12,6 +12,7 @@
 <a href="index.html">English</a>
 <a href="index-ja.html">日本語</a>
 <a href="index-ru.html">Русский</a>
+<a href="index-ko.html">한국어</a>
 
 ## 序言
 
diff --git a/effectivescala-ja.mo b/effectivescala-ja.mo
index 8d275b7..625b42f 100644
--- a/effectivescala-ja.mo
+++ b/effectivescala-ja.mo
@@ -12,6 +12,7 @@
 <a href="index.html">English</a>
 <a href="index-ru.html">Русский</a>
 <a href="index-cn.html">简体中文</a>
+<a href="index-ko.html">한국어</a>
 
 ## 序章
 
diff --git a/effectivescala-ko.mo b/effectivescala-ko.mo
index 13ec053..781872f 100644
--- a/effectivescala-ko.mo
+++ b/effectivescala-ko.mo
@@ -1,7 +1,7 @@
 <a href="http://github.com/twitter/effectivescala"><img style="position: absolute; top: 0; left: 0; border: 0;" src="https://s3.amazonaws.com/github/ribbons/forkme_left_green_007200.png" alt="Fork me on GitHub"></a>
 
 <h1 class="header">Effective Scala</h1>
-<address>Marius Eriksen, Twitter Inc.<br />marius@twitter.com (<a href="http://twitter.com/marius">@marius</a>)</address>
+<address>Marius Eriksen, Twitter Inc.<br />marius@twitter.com (<a href="http://twitter.com/marius">@marius</a>)</address><br /><br />[translated by Sean Lee(<a href="http://github.com/lethee">@lethee</a>)]</address>
 
 <h2>Table of Contents</h2>
 
@@ -12,9 +12,9 @@
 <a href="index-ja.html">日本語</a>
 <a href="index-ru.html">Русский</a>
 <a href="index-cn.html">简体中文</a>
+<a href="index-ko.html">한국어</a>
 
-
-## Introduction
+## 소개
 
 [Scala][Scala] is one of the main application programming languages
 used at Twitter. Much of our infrastructure is written in Scala and
diff --git a/effectivescala-ru.mo b/effectivescala-ru.mo
index 59a4c45..559ea0f 100644
--- a/effectivescala-ru.mo
+++ b/effectivescala-ru.mo
@@ -12,6 +12,7 @@
 <a href="index.html">English</a>
 <a href="index-ja.html">日本語</a>
 <a href="index-cn.html">简体中文</a>
+<a href="index-ko.html">한국어</a>
 
 ## Введение
 
diff --git a/effectivescala.mo b/effectivescala.mo
index 13ec053..f17a535 100644
--- a/effectivescala.mo
+++ b/effectivescala.mo
@@ -12,7 +12,7 @@
 <a href="index-ja.html">日本語</a>
 <a href="index-ru.html">Русский</a>
 <a href="index-cn.html">简体中文</a>
-
+<a href="index-ko.html">한국어</a>
 
 ## Introduction