diff --git a/README.md b/README.md
index 7fc47c07..ed722e96 100644
--- a/README.md
+++ b/README.md
@@ -417,6 +417,7 @@ Read [CONTRIBUTING.md](/CONTRIBUTING.md) to learn how to add your own repos.
 * [novoselov-ab/adventofcode-2021-python](https://github.com/novoselov-ab/adventofcode-2021-python) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2021--12--01-brightgreen)
 * [orfeasa/advent-of-code-2021](https://github.com/orfeasa/advent-of-code-2021) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2021--12--01-brightgreen)
 * [smetanin-av/advent_of_code](https://github.com/smetanin-av/advent_of_code) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2021--12--01-brightgreen)
+* [ernestoarbitrio/AoC2021](https://github.com/ernestoarbitrio/AoC2021) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/ernestoarbitrio/AoC2021)]
 
 #### R