.travis.yml in destroyed_at-0.3.1 vs .travis.yml in destroyed_at-0.4.0

@@ -1,6 +1,10 @@
 rvm:
 - 2.0.0
+- 2.1.0
+
+before_install:
+- gem install bundler -v '= 1.5.1'
 
 notifications:
   hipchat:
     rooms:
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