Install bundler first

adangel · adangel · commit 013d405e0fd5 · 2020-05-28T12:09:28.000+02:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,4 +1,5 @@
 language: ruby
 
+before_install: gem install bundler
 script: bundle exec jekyll build
 after_success: source .travis/publish-website.sh
