diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -152,6 +152,7 @@ Read [CONTRIBUTING.md](/CONTRIBUTING.md) to learn how to add your own repos.
 #### Common Lisp
 
 *Solutions to AoC in Common Lisp.*
+* [ m3m0ry/2020-aoc](https://github.com/m3m0ry/2020-aoc) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--12--01-orange)
 
 #### Crystal