diff --git a/Gemfile b/Gemfile
index f41d705..6480fe5 100644
--- a/Gemfile
+++ b/Gemfile
@@ -17,4 +17,4 @@ gem 'epubcheck-ruby', '5.3.0.0'
 gem 'html-proofer', '5.2.2'
 gem 'kindlegen', '3.1.1'
 
-gem 'rouge', '5.0.0'
+gem 'rouge', '5.1.0'