.travis.yml in typogen-0.2.1 vs .travis.yml in typogen-0.2.2

@@ -4,6 +4,6 @@
   - 2.0
   - 2.1
   - 2.2
   - 2.3.3
   - 2.4.0
-before_install: gem install bundler -v 1.15.1
+before_install: gem install bundler -v 1.15.3