diff --git a/README.md b/README.md
index bc5d1e1..121a0d7 100644
--- a/README.md
+++ b/README.md
@@ -12,7 +12,7 @@ let IntervalTree = persistent.intervaltree( fingertree.empty , INTERVAL ) ;
 ```
 
 
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+[![License](https://img.shields.io/github/license/aureooms/js-persistent.svg?style=flat)](https://raw.githubusercontent.com/aureooms/js-persistent/master/LICENSE)
 [![NPM version](https://img.shields.io/npm/v/@aureooms/js-persistent.svg?style=flat)](https://www.npmjs.org/package/@aureooms/js-persistent)
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