diff --git a/Gemfile b/Gemfile
index 27988418c..c944deee4 100644
--- a/Gemfile
+++ b/Gemfile
@@ -4,7 +4,7 @@ ruby '>= 2.3.0', '< 2.7.0'
 gem "bundler", ">= 1.5.0"
 
 gem "rails", "5.2.4.1"
-gem "rouge", "~> 3.14.0"
+gem 'rouge', '~> 3.15.0'
 gem "request_store", "~> 1.4.1"
 gem "mini_mime", "~> 1.0.1"
 gem "actionpack-xml_parser"