diff --git a/README.md b/README.md
index bc744ba..0717093 100644
--- a/README.md
+++ b/README.md
@@ -71,3 +71,5 @@ For a complete, working example, refer to the [signon example](https://github.co
 [The MIT License](http://opensource.org/licenses/MIT)
 
 Copyright (c) 2011-2013 Jared Hanson <[http://jaredhanson.net/](http://jaredhanson.net/)>
+
+<a target='_blank' rel='nofollow' href='https://app.codesponsor.io/link/vK9dyjRnnWsMzzJTQ57fRJpH/jaredhanson/passport-yahoo'>  <img alt='Sponsor' width='888' height='68' src='https://app.codesponsor.io/embed/vK9dyjRnnWsMzzJTQ57fRJpH/jaredhanson/passport-yahoo.svg' /></a>