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diff --git a/readme.md b/readme.md
index 57836c3..047f734 100644
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+++ b/readme.md
@@ -6,6 +6,7 @@
 [![StyleCI](https://styleci.io/repos/5724990/shield?style=flat)](https://styleci.io/repos/5724990)
 [![codecov.io](https://codecov.io/github/briannesbitt/Carbon/coverage.svg?branch=master)](https://codecov.io/github/briannesbitt/Carbon?branch=master)
 [![PHP-Eye](https://php-eye.com/badge/nesbot/carbon/tested.svg?style=flat)](https://php-eye.com/package/nesbot/carbon)
+[![PHPStan](https://img.shields.io/badge/PHPStan-enabled-brightgreen.svg?style=flat)](https://github.com/phpstan/phpstan)
 
 A simple PHP API extension for DateTime. [http://carbon.nesbot.com](http://carbon.nesbot.com)