Fix Bundler related error on Travis CI

kou · kou · commit ba059c91e414 · 2016-05-06T23:33:09.000+09:00
diff --git a/.travis.yml b/.travis.yml
@@ -18,6 +18,7 @@ notifications:
     - lourens@methodmissing.com
     - matt.connolly@me.com
 before_install:
+  - gem update bundler
   - if [[ $(ruby -v) =~ rubinius ]]; then travis_retry gem install rubysl; fi; gem list; true
 matrix:
   allow_failures:
