diff --git a/README.md b/README.md
index 8d0a7fa..4b0b3ad 100644
--- a/README.md
+++ b/README.md
@@ -4,6 +4,7 @@ LQDOJ: Le Quy Don Online Judge
 [![](https://github.com/DMOJ/online-judge/workflows/build/badge.svg)](https://lqdoj.edu.vn/)
 [![Python](https://img.shields.io/pypi/pyversions/tensorflow.svg?style=plastic)](https://python.org)
 [![OS](https://img.shields.io/badge/Ubuntu-16.04%20%7C%2018.04%20%7C%2020.04-brightgreen)](https://ubuntu.com/download)
+[![License](https://img.shields.io/badge/license-AGPL--3.0-blue)](https://www.gnu.org/licenses/agpl-3.0.en.html)
 
 ## Overview