diff --git a/README.md b/README.md
index b3739c69..8e339913 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
 
 A Ruby library for verifying and serving OpenID identities.
 
-[![Build Status](https://secure.travis-ci.org/openid/ruby-openid.png)](http://travis-ci.org/openid/ruby-openid)
+[![Build Status](https://secure.travis-ci.org/openid/ruby-openid.svg)](http://travis-ci.org/openid/ruby-openid)
 
 ## Features