Update README.md

Author: fjmorant

README.md

@@ -111,4 +111,8 @@ When you finish with watch mode remember to stop it to get back to normal like t
 
 ## Invite me a coffee
 
-If you want to invite me for a coffee after enjoying this library or just for fun you can follow this link https://ko-fi.com/fjmorant. Thanks
+If you want to invite me for a coffee after enjoying this library or just for fun. 
+
+[![ko-fi](https://ko-fi.com/img/githubbutton_sm.svg)](https://ko-fi.com/D1D16TF2V)
+
+Thanks