diff --git a/.travis.yml b/.travis.yml
index 5a68fdc..1c16bfd 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,6 @@
 sudo: false
 language: ruby
-before_install: gem install bundler -v 1.15.2
+before_install: gem install bundler -v 1.17.3
 matrix:
   include:
     - gemfile: graphql-1.7.gemfile