diff --git a/guides/Gemfile b/guides/Gemfile
index e68abc2eca0..631eb90831f 100644
--- a/guides/Gemfile
+++ b/guides/Gemfile
@@ -2,7 +2,7 @@ source "http://rubygems.org"
 
 gem 'builder'
 gem 'coderay_bash'
-gem 'kramdown'
+gem 'kramdown', '>= 2.3.1'
 gem 'mime-types'
 gem 'nokogiri'
 gem 'nanoc', '3.6.3'