diff --git a/Gemfile b/Gemfile
index fd0e7729d..3727ed1f5 100644
--- a/Gemfile
+++ b/Gemfile
@@ -83,7 +83,7 @@ gem "redis", "~> 4.1.3" # Redis ruby client
 gem "redis-rails", "~> 5.0.2" # Redis for Ruby on Rails
 gem "reverse_markdown", "~> 2.0" # Map simple html back into markdown
 gem "rolify", "~> 5.2" # Very simple Roles library
-gem "rouge", "~> 3.16" # A pure-ruby code highlighter
+gem "rouge", "~> 3.18" # A pure-ruby code highlighter
 gem "rubyzip", "~> 2.3" # Rubyzip is a ruby library for reading and writing zip files
 gem "s3_direct_upload", "~> 0.1" # Direct Upload to Amazon S3
 gem "sass-rails", "~> 6.0" # Sass adapter for the Rails asset pipeline
diff --git a/Gemfile.lock b/Gemfile.lock
index 89243bb11..ded88d292 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -631,7 +631,7 @@ GEM
       nokogiri
     rexml (3.2.4)
     rolify (5.2.0)
-    rouge (3.17.0)
+    rouge (3.18.0)
     rspec (3.9.0)
       rspec-core (~> 3.9.0)
       rspec-expectations (~> 3.9.0)
@@ -942,7 +942,7 @@ DEPENDENCIES
   redis-rails (~> 5.0.2)
   reverse_markdown (~> 2.0)
   rolify (~> 5.2)
-  rouge (~> 3.16)
+  rouge (~> 3.18)
   rspec-rails (~> 4.0)
   rspec-retry (~> 0.6)
   rubocop (~> 0.82)