diff --git a/Gemfile b/Gemfile
index 863bd9d..787746d 100644
--- a/Gemfile
+++ b/Gemfile
@@ -9,6 +9,6 @@ gem 'capistrano', '~> 3.10.2'
 gem 'capistrano-rails', '~> 1.3.1'
 gem 'capistrano-rbenv', '~> 2.1.3'
 
-gem 'commonmarker', '~> 0.17.9'
+gem 'commonmarker', '~> 0.22.0'
 gem 'graphql-docs', '~> 1.4.0'
 gem 'sass', '~> 3.5.6'
diff --git a/Gemfile.lock b/Gemfile.lock
index dc51af9..081bae7 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -24,9 +24,8 @@ GEM
       capistrano (~> 3.1)
       sshkit (~> 1.3)
     coderay (1.1.2)
-    commonmarker (0.17.9)
-      ruby-enum (~> 0.5)
-    concurrent-ruby (1.0.5)
+    commonmarker (0.22.0)
+    concurrent-ruby (1.1.9)
     extended-markdown-filter (0.6.0)
       html-pipeline (~> 2.0)
     ffi (1.9.23)
@@ -41,7 +40,7 @@ GEM
     html-pipeline (2.8.0)
       activesupport (>= 2)
       nokogiri (>= 1.4)
-    i18n (1.0.1)
+    i18n (1.8.10)
       concurrent-ruby (~> 1.0)
     method_source (0.9.0)
     mini_portile2 (2.3.0)
@@ -70,8 +69,6 @@ GEM
       rainbow (>= 2.2.2, < 4.0)
       ruby-progressbar (~> 1.7)
       unicode-display_width (~> 1.0, >= 1.0.1)
-    ruby-enum (0.7.2)
-      i18n
     ruby-progressbar (1.9.0)
     sass (3.5.6)
       sass-listen (~> 4.0.0)
@@ -93,7 +90,7 @@ DEPENDENCIES
   capistrano (~> 3.10.2)
   capistrano-rails (~> 1.3.1)
   capistrano-rbenv (~> 2.1.3)
-  commonmarker (~> 0.17.9)
+  commonmarker (~> 0.22.0)
   graphql-docs (~> 1.4.0)
   pry (~> 0.11.3)
   rubocop (~> 0.56.0)