diff --git a/README.md b/README.md
index 037ffb11..65ed1954 100644
--- a/README.md
+++ b/README.md
@@ -549,6 +549,7 @@ Read [CONTRIBUTING.md](/CONTRIBUTING.md) to learn how to add your own repos.
 * [czeildi/advent-of-code](https://github.com/czeildi/advent-of-code) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2021--12--07-brightgreen)
 * [plannapus/Advent_of_Code](https://github.com/plannapus/Advent_of_Code) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2021--12--07-brightgreen)
 * [rrrlw/advent-of-code](https://github.com/rrrlw/advent-of-code) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2021--12--06-brightgreen)
+* [midoriyama0323/adventofcode2021](https://github.com/midoriyama0323/adventofcode2021)
 
 #### Racket