Use SVG travis badge

README.md

diff --git a/README.md b/README.md
index a7ce2b2..4011ec1 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-Overview [![Build Status](https://travis-ci.org/magiconair/properties.png?branch=master)](https://travis-ci.org/magiconair/properties)
+Overview [![Build Status](https://travis-ci.org/magiconair/properties.svg?branch=master)](https://travis-ci.org/magiconair/properties)
 ========
 
 properties is a Go library for reading and writing properties files.