diff --git a/Gemfile b/Gemfile
index 88d00740d..e622c7fa7 100644
--- a/Gemfile
+++ b/Gemfile
@@ -2,4 +2,4 @@ source 'https://rubygems.org'
 
 gem 'asciidoctor'
 gem 'asciidoctor-pdf'
-gem 'rouge'
+gem 'rouge', '3.30.0'