diff --git a/problem-sets-competitive-programming.md b/problem-sets-competitive-programming.md
index e4f58fec1..ee2fdb359 100644
--- a/problem-sets-competitive-programming.md
+++ b/problem-sets-competitive-programming.md
@@ -27,6 +27,7 @@
 ### Problem Sets
 
 * [Anarchy Golf](http://golf.shinh.org)
+* [Advent Of Code](http://adventofcode.com)
 * [CareerCup](http://www.careercup.com)
 * [CheckIO](http://www.checkio.org)
 * [CodeHunt](https://www.codehunt.com)