diff --git a/.travis.yml b/.travis.yml
index d8449a3..48bc7b1 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,6 +3,8 @@ rvm:
   - 2.4
   - 2.5
   - 2.6
+before_install:
+  - gem install bundler
 script: bundle exec rake spec
 gemfile:
   - gemfiles/rails5.gemfile