diff --git a/.travis.yml b/.travis.yml
index ddfaf94..0506907 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -10,7 +10,7 @@ rvm:
   - 2.3.8
 
 before_install:
-  - gem update --system
+  - yes | gem update --system
   - gem install bundler -v "~> 2.0"
 
 gemfile: