diff --git a/Gemfile b/Gemfile
index 9739ef6..f5e6105 100644
--- a/Gemfile
+++ b/Gemfile
@@ -20,6 +20,8 @@ gem 'jekyll-sitemap'
 # html-proofer for testing
 gem 'html-proofer'
 
+gem 'rake'
+
 # If you want to use GitHub Pages, remove the "gem "jekyll"" above and
 # uncomment the line below. To upgrade, run `bundle update github-pages`.
 # gem "github-pages", group: :jekyll_plugins
diff --git a/Gemfile.lock b/Gemfile.lock
index 59de4ea..8ced6f6 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -60,6 +60,7 @@ GEM
     pathutil (0.14.0)
       forwardable-extended (~> 2.6)
     public_suffix (2.0.5)
+    rake (12.0.0)
     rb-fsevent (0.9.8)
     rb-inotify (0.9.8)
       ffi (>= 0.5.0)
@@ -82,6 +83,7 @@ DEPENDENCIES
   jekyll-feed (~> 0.6)
   jekyll-sitemap
   minima (~> 2.0)
+  rake
 
 RUBY VERSION
    ruby 2.2.3p173