diff --git a/README.md b/README.md
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+++ b/README.md
@@ -1,6 +1,7 @@
 # LeetCode-in-Python
 
 [![MIT License](https://img.shields.io/badge/license-MIT-green.svg)](https://github.com/LeetCode-in-Python/LeetCode-in-Python/blob/main/LICENSE)
+[![Maintainability Rating](https://sonarcloud.io/api/project_badges/measure?project=LeetCode-in-Python_LeetCode-in-Python&metric=sqale_rating)](https://sonarcloud.io/summary/new_code?id=LeetCode-in-Python_LeetCode-in-Python)
 [![](https://img.shields.io/github/stars/LeetCode-in-Python/LeetCode-in-Python?style=flat-square)](https://github.com/LeetCode-in-Python/LeetCode-in-Python)
 [![](https://img.shields.io/github/forks/LeetCode-in-Python/LeetCode-in-Python?style=flat-square)](https://github.com/LeetCode-in-Python/LeetCode-in-Python/fork)