diff --git a/Gemfile b/Gemfile
index 017e591b4..405429c61 100644
--- a/Gemfile
+++ b/Gemfile
@@ -10,7 +10,7 @@ gem 'asciidoctor-epub3', '1.5.0.alpha.19'
 gem 'asciidoctor-pdf', '1.5.4'
 
 gem 'coderay', '1.1.3'
-gem 'pygments.rb', '1.2.1'
+gem 'pygments.rb', '2.0.0'
 gem 'thread_safe', '0.3.6'
 gem 'epubcheck-ruby', '4.2.4.0'
 gem 'html-proofer', '3.18.5'