diff --git a/README.md b/README.md
index 31931b48..a308aa54 100644
--- a/README.md
+++ b/README.md
@@ -57,4 +57,4 @@ Licensed under the [MIT license](https://github.com/imakewebthings/deck.js/blob/
 ## Donations
 
 [![Gittip donate
-button](http://img.shields.io/gittip/imakewebthings.png)](https://www.gittip.com/imakewebthings/ "Donate weekly to this project using Gittip")
+button](http://img.shields.io/gittip/imakewebthings.svg)](https://www.gittip.com/imakewebthings/ "Donate weekly to this project using Gittip")