diff --git a/README.md b/README.md
index ca29a4f..b162a27 100644
--- a/README.md
+++ b/README.md
@@ -89,7 +89,7 @@ Please read the [contribution guidelines](CONTRIBUTING.md) if you want to contri
 * [authy-ssh](https://github.com/authy/authy-ssh) [![stars](https://img.shields.io/github/stars/authy/authy-ssh.svg?style=social&label=stars)](https://github.com/authy/authy-ssh) - Easy *two-factor* authentication for *SSH* servers.
 * [github-auth](https://github.com/chrishunt/github-auth) [![stars](https://img.shields.io/github/stars/chrishunt/github-auth.svg?style=social&label=stars)](https://github.com/chrishunt/github-auth) - *SSH* key management for GitHub users.
 * [cipherhub](https://github.com/substack/cipherhub) [![stars](https://img.shields.io/github/stars/substack/cipherhub.svg?style=social&label=stars)](https://github.com/substack/cipherhub) - Encrypt messages based on *SSH* public keys with easy import from GitHub.
-* [Slack notifications](http://www.ryanbrink.com/slack-ssh-session-notifications/) - Guide to setup Slack notifications (can be modified for other services).
+* [Slack notifications](http://www.ryanbrink.com/slack-ssh-session-notifications/) ([archived version](https://web.archive.org/web/20160505202303/http://www.ryanbrink.com/slack-ssh-session-notifications/)) - Guide to setup Slack notifications (can be modified for other services).
 * [totp-ssh-fluxer](https://github.com/benjojo/totp-ssh-fluxer) [![stars](https://img.shields.io/github/stars/benjojo/totp-ssh-fluxer.svg?style=social&label=stars)](https://github.com/benjojo/totp-ssh-fluxer) - A way to make sure your `sshd` port changes every 30 seconds.
 * [github-keygen](https://github.com/dolmen/github-keygen) [![stars](https://img.shields.io/github/stars/dolmen/github-keygen.svg?style=social&label=stars)](https://github.com/dolmen/github-keygen) - Easy creation of secure *SSH* configuration for your GitHub account(s).
 * [kr](https://github.com/KryptCo/kr) [![stars](https://img.shields.io/github/stars/dolmen/github-keygen.svg?style=social&label=stars)](https://github.com/KryptCo/kr) - Kr agent that route access request to the paired mobile phone where Kryptonite is installed.