From 20482aec3b14853a1560551e77e6d06abc981b13 Mon Sep 17 00:00:00 2001
From: Yasuo Honda <yasuo.honda@gmail.com>
Date: Thu, 12 Apr 2018 16:17:16 +0000
Subject: [PATCH] Perform `gem install bundler` to address `LoadError: cannot
 load such file -- bundler/dep_proxy`

```ruby
bundle exec rake
bundler: failed to load command: rake (/home/travis/build/mikel/mail/vendor/bundle/ruby/2.5.0/bin/rake)
LoadError: cannot load such file -- bundler/dep_proxy
```
---
 .travis.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.travis.yml b/.travis.yml
index ae182fb5f..ac5c3e86d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,7 +4,7 @@ cache: bundler
 
 bundler_args: --without local_development
 before_install:
-  - gem update bundler
+  - gem install bundler
 
 script: bundle exec rake