diff --git a/README.md b/README.md
index b7aaeac..a26a03a 100644
--- a/README.md
+++ b/README.md
@@ -2,6 +2,7 @@
 
 ![Node CI](https://github.com/unadlib/mutability/workflows/Node%20CI/badge.svg)
 [![npm version](https://badge.fury.io/js/mutability.svg)](http://badge.fury.io/js/mutability)
+![license](https://img.shields.io/npm/l/use-mutative)
 
 A JavaScript library for transactional mutable updates
 
@@ -12,7 +13,13 @@ When we want to perform transactional updates on a mutable object, if an error i
 ## Installation
 
 ```sh
-yarn add mutability mutative
+yarn add mutative mutability
+```
+
+or with npm
+
+```sh
+npm install mutative mutability
 ```
 
 ## Usage