Update README.md

Author: DaneEveritt

README.md

@@ -12,7 +12,7 @@ UI to end users.
 
 Stop settling for less. Make game servers a first class citizen on your platform.
 
-![Image](https://cdn.pterodactyl.io/site-assets/mockup-macbook-grey.png)
+![Image](https://cdn.pterodactyl.io/site-assets/pterodactyl_v1_demo.gif)
 
 ## Sponsors
 I would like to extend my sincere thanks to the following sponsors for helping find Pterodactyl's developement.