diff --git a/README.md b/README.md
index 8c12a6c..75de426 100644
--- a/README.md
+++ b/README.md
@@ -2,6 +2,7 @@
 [![Bugs](https://sonarqube.richard-neumann.de/api/project_badges/measure?project=rcon&metric=bugs)](https://sonarqube.richard-neumann.de/dashboard?id=rcon)
 [![Code Smells](https://sonarqube.richard-neumann.de/api/project_badges/measure?project=rcon&metric=code_smells)](https://sonarqube.richard-neumann.de/dashboard?id=rcon)
 [![Lines of Code](https://sonarqube.richard-neumann.de/api/project_badges/measure?project=rcon&metric=ncloc)](https://sonarqube.richard-neumann.de/dashboard?id=rcon)
+[![Maintainability Rating](https://sonarqube.richard-neumann.de/api/project_badges/measure?project=rcon&metric=sqale_rating)](https://sonarqube.richard-neumann.de/dashboard?id=rcon)
 [![Quality Gate Status](https://sonarqube.richard-neumann.de/api/project_badges/measure?project=rcon&metric=alert_status)](https://sonarqube.richard-neumann.de/dashboard?id=rcon)
 [![Reliability Rating](https://sonarqube.richard-neumann.de/api/project_badges/measure?project=rcon&metric=reliability_rating)](https://sonarqube.richard-neumann.de/dashboard?id=rcon)
 [![Security Rating](https://sonarqube.richard-neumann.de/api/project_badges/measure?project=rcon&metric=security_rating)](https://sonarqube.richard-neumann.de/dashboard?id=rcon)