diff --git a/jekyll.gemspec b/jekyll.gemspec
index 4bff92df..21977b6e 100644
--- a/jekyll.gemspec
+++ b/jekyll.gemspec
@@ -31,6 +31,7 @@ Gem::Specification.new do |s|
   s.add_runtime_dependency('pygments.rb', "~> 0.4.2")
   s.add_runtime_dependency('commander', "~> 4.1.3")
   s.add_runtime_dependency('safe_yaml', "~> 0.7.0")
+  s.add_runtime_dependency('colorator', "~> 0.1")
 
   s.add_development_dependency('rake', "~> 10.0.3")
   s.add_development_dependency('rdoc', "~> 3.11")