diff --git a/.travis.yml b/.travis.yml
index 3091124a6798d59446fdc4180d39ca606e87a27f..56e74410e1535b46c709faaf0450978fde1ee815 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -21,6 +21,7 @@ branches:
     - 'master'
     - 'develop'
 
+before_install: gem install bundler
 bundler_args: "--without development production heroku --jobs 3 --retry 3"
 
 script: "./script/ci/build.sh"