Update README.md

Author: thebuilder

README.md

@@ -36,16 +36,16 @@ npm install react-intersection-observer --save
 ### Polyfill for intersection-observer
 The component requires the [intersection-observer API](https://developer.mozilla.org/en-US/docs/Web/API/Intersection_Observer_API) to be available on the global namespace. At the moment it is included in Chrome, Firefox, Opera and Edge. Make sure to include the polyfill to support other browsers like IE and Webkit.
 
-You can import the [polyfill](https://github.com/jeremenichelli/intersection-observer-polyfill) directly or use a service like [polyfill.io](https://polyfill.io/v2/docs/).
+You can import the [polyfill](https://yarnpkg.com/en/package/intersection-observer) directly or use a service like [polyfill.io](https://polyfill.io/v2/docs/) that can add it when needed.
 
 ```sh
-yarn add intersection-observer-polyfill
+yarn add intersection-observer
 ```
 
 Then import it in your app
 
 ```js
-import 'intersection-observer-polyfill'
+import 'intersection-observer'
 ```
 
 ## Props