diff --git a/Gemfile b/Gemfile
index 4ecffb4f..9dbe16ee 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,7 +1,7 @@
 source 'https://rubygems.org'
 
 gem 'rake'
-gem 'asciidoctor', '1.5.6.1'
+gem 'asciidoctor', '2.0.12'
 
 gem 'json'
 gem 'awesome_print'