Merge pull request xebia-functional#174 from 47deg/fix-travis-ci

Don't run 'gem update --system'

Author: purrgrammer

.travis.yml

@@ -17,7 +17,6 @@ before_install:
 
 install:
 - rvm use 2.3.0 --install --fuzzy
-- gem update --system
 - gem install sass
 - gem install jekyll -v 3.2.1