Fix bundler

haruyama-makoto · haruyama-makoto · commit 0c9dc901d479 · 2019-04-19T09:57:12.000+09:00
diff --git a/.travis.yml b/.travis.yml
@@ -7,7 +7,9 @@ rvm:
   - 2.3
   - 2.2
 
-before_install: gem install bundler -v 1.14.3
+before_install:
+  - gem uninstall bundler -x
+  - gem install bundler -v 1.14.3
 
 before_script:
  - bundle exec rake compile
