diff --git a/README.md b/README.md
index 21643191..c51b9ae6 100644
--- a/README.md
+++ b/README.md
@@ -514,6 +514,7 @@ Read [CONTRIBUTING.md](/CONTRIBUTING.md) to learn how to add your own repos.
 * [csj/advent-of-code-2021](https://github.com/csj/advent-of-code-2021) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2021--12--18-brightgreen)
 * [lucifer1004/AoC](https://github.com/lucifer1004/AoC) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2021--12--18-brightgreen)
 * [underwindfall/advent-of-code-2021](https://github.com/underwindfall/advent-of-code-2021) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2021--12--16-brightgreen)
+* [piotrponikowski/AdventOfCode2021](https://github.com/piotrponikowski/AdventOfCode2021)
 
 #### LDPL