diff --git a/README.ko.md b/README.ko.md
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--- a/README.ko.md
+++ b/README.ko.md
@@ -1,6 +1,6 @@
 # GitHub 치트 시트 [![Awesome](https://cdn.rawgit.com/sindresorhus/awesome/d7305f38d29fed78fa85652e3a63e154dd8e8829/media/badge.svg)](https://github.com/sindresorhus/awesome)
 
-Git과 GitHub에서 꽤 유용하지만 숨겨져 있는 기능들에 대해 다룹니다. 이 치트 시트는 [Zach Holman](https://github.com/holman)이 Aloha Ruby Conference 2012에서 발표한 [Git과 GitHub의 비밀들](http://confreaks.tv/videos/aloharuby2012-git-and-github-secrets) ([슬라이드](https://speakerdeck.com/holman/git-and-github-secrets))과 WDCNZ 2013에서 발표한 [Git과 GitHub에 대한 더 많은 비밀들](https://vimeo.com/72955426) ([슬라이드](https://speakerdeck.com/holman/more-git-and-github-secrets))에서 영감을 받아 작성되었습니다.
+Git과 GitHub에서 꽤 유용하지만 숨겨져 있는 기능들에 대해 다룹니다. 이 치트 시트는 [Zach Holman](https://github.com/holman)이 Aloha Ruby Conference 2012에서 발표한 [Git과 GitHub의 비밀들](https://zachholman.com/talk/git-github-secrets/) ([슬라이드](https://speakerdeck.com/holman/git-and-github-secrets))과 WDCNZ 2013에서 발표한 [Git과 GitHub에 대한 더 많은 비밀들](https://vimeo.com/72955426) ([슬라이드](https://speakerdeck.com/holman/more-git-and-github-secrets))에서 영감을 받아 작성되었습니다.
 
 *단축주소: [`http://git.io/sheet`](http://git.io/sheet)*
 
diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -1,5 +1,5 @@
 # GitHub Cheat Sheet [![Awesome](https://cdn.rawgit.com/sindresorhus/awesome/d7305f38d29fed78fa85652e3a63e154dd8e8829/media/badge.svg)](https://github.com/sindresorhus/awesome)
-A collection of cool hidden and not so hidden features of Git and GitHub. This cheat sheet was inspired by [Zach Holman](https://github.com/holman)'s [Git and GitHub Secrets](http://confreaks.tv/videos/aloharuby2012-git-and-github-secrets) talk at Aloha Ruby Conference 2012 ([slides](https://speakerdeck.com/holman/git-and-github-secrets)) and his [More Git and GitHub Secrets](https://vimeo.com/72955426) talk at WDCNZ 2013 ([slides](https://speakerdeck.com/holman/more-git-and-github-secrets)).
+A collection of cool hidden and not so hidden features of Git and GitHub. This cheat sheet was inspired by [Zach Holman](https://github.com/holman)'s [Git and GitHub Secrets](https://zachholman.com/talk/git-github-secrets/) talk at Aloha Ruby Conference 2012 ([slides](https://speakerdeck.com/holman/git-and-github-secrets)) and his [More Git and GitHub Secrets](https://vimeo.com/72955426) talk at WDCNZ 2013 ([slides](https://speakerdeck.com/holman/more-git-and-github-secrets)).
 
 *Shortlink: [`http://git.io/sheet`](http://git.io/sheet)*
 
diff --git a/README.zh-cn.md b/README.zh-cn.md
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 # GitHub秘籍 [![Awesome](https://cdn.rawgit.com/sindresorhus/awesome/d7305f38d29fed78fa85652e3a63e154dd8e8829/media/badge.svg)](https://github.com/sindresorhus/awesome)
-Git 和 Github 秘籍，灵感来自于 [Zach Holman](https://github.com/holman) 在 2012 年 Aloha Ruby Conference 和 2013 年 WDCNZ 上所做的演讲：[Git and GitHub Secrets](http://www.confreaks.com/videos/1229-aloharuby2012-git-and-github-secrets)([slides](https://speakerdeck.com/holman/git-and-github-secrets)) 和 [More Git and GitHub Secrets](https://vimeo.com/72955426)([slides](https://speakerdeck.com/holman/more-git-and-github-secrets))。
+Git 和 Github 秘籍，灵感来自于 [Zach Holman](https://github.com/holman) 在 2012 年 Aloha Ruby Conference 和 2013 年 WDCNZ 上所做的演讲：[Git and GitHub Secrets](https://zachholman.com/talk/git-github-secrets/)([slides](https://speakerdeck.com/holman/git-and-github-secrets)) 和 [More Git and GitHub Secrets](https://vimeo.com/72955426)([slides](https://speakerdeck.com/holman/more-git-and-github-secrets))。
 
 *其他语言版本: [English](README.md), [한국어](README.ko.md), [日本語](README.ja.md), [简体中文](README.zh-cn.md), [正體中文](README.zh-tw.md).*
 
diff --git a/README.zh-tw.md b/README.zh-tw.md
index cfc43c2..72fd1ba 100644
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+++ b/README.zh-tw.md
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 # GitHub秘笈 [![Awesome](https://cdn.rawgit.com/sindresorhus/awesome/d7305f38d29fed78fa85652e3a63e154dd8e8829/media/badge.svg)](https://github.com/sindresorhus/awesome)
-Git 和 Github 秘笈，靈感來自於 [Zach Holman](https://github.com/holman) 在 2012 年 Aloha Ruby Conference 和 2013 年 WDCNZ 上所做的演講：[Git and GitHub Secrets](http://www.confreaks.com/videos/1229-aloharuby2012-git-and-github-secrets)([slides](https://speakerdeck.com/holman/git-and-github-secrets)) 和 [More Git and GitHub Secrets](https://vimeo.com/72955426)([slides](https://speakerdeck.com/holman/more-git-and-github-secrets))。
+Git 和 Github 秘笈，靈感來自於 [Zach Holman](https://github.com/holman) 在 2012 年 Aloha Ruby Conference 和 2013 年 WDCNZ 上所做的演講：[Git and GitHub Secrets](https://zachholman.com/talk/git-github-secrets/)([slides](https://speakerdeck.com/holman/git-and-github-secrets)) 和 [More Git and GitHub Secrets](https://vimeo.com/72955426)([slides](https://speakerdeck.com/holman/more-git-and-github-secrets))。
 
 *其他語言版本: [English](README.md), [한국어](README.ko.md), [日本語](README.ja.md), [簡體中文](README.zh-cn.md), [正體中文](README.zh-tw.md).*