diff --git a/README.md b/README.md
index e52fb08..769919c 100644
--- a/README.md
+++ b/README.md
@@ -539,6 +539,7 @@ Libraries to help manage database schemas and migrations.
 * [Lock](https://github.com/BeatSwitch/lock) - A library for implementing Access Control Lists (ACL) systems.
 * [OAuth 1.0 Client](https://github.com/thephpleague/oauth1-client) - An OAuth 1.0 client library.
 * [OAuth 2.0 Client](https://github.com/thephpleague/oauth2-client) - An OAuth 2.0 client library.
+* [KnpUGuard](https://github.com/knpuniversity/KnpUGuard) - Adds simple and beautiful authentication to Symfony's security component in Silex and anywhere else.
 
 ## Markup
 *Libraries for working with markup.*