diff --git a/.travis.yml b/.travis.yml
index f2e77cd1..1f9c7a3c 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,7 +4,7 @@ osx_image: xcode9.2
 
 before_install:
   - curl http://curl.haxx.se/ca/cacert.pem -o /usr/local/share/cacert.pem
-  - gem install bundler --no-ri --no-rdoc
+  - gem install bundler -v "~> 1.0" --no-ri --no-rdoc
 
 install:
   - bundle install --without=documentation