diff --git a/.travis.yml b/.travis.yml
index 03ee64f..59f3a88 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,4 +2,5 @@ sudo: false
 language: ruby
 rvm:
   - 2.3.1
-before_install: gem install bundler -v 1.12.5
+  - 2.4.3
+before_install: gem install bundler