diff --git a/Gemfile b/Gemfile
index eebe81329..4964481d3 100644
--- a/Gemfile
+++ b/Gemfile
@@ -32,7 +32,7 @@ gem 'rexml'
 # Reduces boot times through caching; required in config/boot.rb
 gem 'bootsnap', '>= 1.4.2', require: false
 
-gem 'commonmarker', '0.23.7'
+gem 'commonmarker', '0.23.9'
 gem 'octicons'
 gem 'octicons_helper'
 gem 'gemoji'
diff --git a/Gemfile.lock b/Gemfile.lock
index 2fdefa8cf..661667fb4 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -79,7 +79,7 @@ GEM
     childprocess (3.0.0)
     chronic (0.10.2)
     coderay (1.1.3)
-    commonmarker (0.23.7)
+    commonmarker (0.23.9)
     concurrent-ruby (1.2.2)
     crass (1.0.6)
     date (3.3.3)
@@ -271,7 +271,7 @@ DEPENDENCIES
   bootsnap (>= 1.4.2)
   byebug
   capybara (>= 2.15)
-  commonmarker (= 0.23.7)
+  commonmarker (= 0.23.9)
   deckar01-task_list
   dotenv-rails
   escape_utils (~> 1.0)