diff --git a/.travis.yml b/.travis.yml
index d03ce58..0f80749 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -31,7 +31,7 @@ addons:
     - libeditline-dev
     - libedit-dev
 before_install:
- - gem update bundler
+ - gem install bundler --version 1.17.3
 notifications:
   email:
     recipients: