diff --git a/README.md b/README.md
index c4914c8..e233009 100644
--- a/README.md
+++ b/README.md
@@ -977,6 +977,7 @@ A curated list of awesome C++ (or C) frameworks, libraries, resources, and shiny
 
 * [access_profiler](https://github.com/arvidn/access_profiler) - A tool to count accesses to member variables in c++ programs. [GPL3]
 * [American fuzzy lop](http://lcamtuf.coredump.cx/afl/) a.k.a. afl-fuzz - Crazy fuzzing tool that automatically discovers bugs given time and minimal example input. [Apache2]
+* [Argon2](https://github.com/P-H-C/phc-winner-argon2) - The password hash Argon2, winner of PHC. [CC0/Apache2]
 * [Better String](http://bstring.sourceforge.net) - An alternative to the string library for C which is more functional and does not have buffer overflow overrun problems. Also includes a C++ wrapper. [BSD, GPL2]
 * [Boost.Signals](http://www.boost.org/doc/libs/1_56_0/doc/html/signals.html) - An implementation of a managed signals and slots system. [Boost]
 * [Concord](https://github.com/Cogmasters/concord) - A Discord API wrapper library written in C. [MIT] [website](https://cogmasters.github.io/concord)