diff --git a/site/_docs/continuous-integration.md b/site/_docs/continuous-integration.md
index d559a421..18506077 100644
--- a/site/_docs/continuous-integration.md
+++ b/site/_docs/continuous-integration.md
@@ -72,6 +72,16 @@ with Ruby and requires RubyGems to install, we use the Ruby language build
 environment. Below is a sample `.travis.yml` file, followed by
 an explanation of each line.
 
+**Note:** You will need a Gemfile as well, [Travis will automatically install](http://docs.travis-ci.com/user/languages/ruby/#Dependency-Management) the dependencies based on the referenced gems:
+
+{% highlight ruby %}
+source "https://rubygems.org"
+
+gem "jekyll"
+gem "html-proofer"
+{% endhighlight %}
+
+
 {% highlight yaml %}
 language: ruby
 rvm: