Update README.md

Author: EricSimons

README.md

@@ -2,7 +2,7 @@
 
 > ### React + Redux codebase containing real world examples (CRUD, auth, advanced patterns, etc) that adheres to the [RealWorld](https://github.com/gothinkster/realworld-example-apps) spec and API.
 
-<a href="https://thinkster.io/tutorials/build-a-real-world-react-redux-application" target="_blank"><img height="40" width="454" src="https://raw.githubusercontent.com/gothinkster/realworld/master/media/learn-btn-hr.png" /></a>
+<a href="https://thinkster.io/tutorials/build-a-real-world-react-redux-application" target="_blank"><img width="454" src="https://raw.githubusercontent.com/gothinkster/realworld/master/media/learn-btn-hr.png" /></a>
 
 ### [Demo](https://react-redux.realworld.io)&nbsp;&nbsp;&nbsp;&nbsp;[RealWorld](https://github.com/gothinkster/realworld)