diff --git a/Gemfile b/Gemfile
index cb6acc8..2de8d2c 100644
--- a/Gemfile
+++ b/Gemfile
@@ -33,7 +33,7 @@ gem 'kramdown'
 gem 'liquid'
 gem 'listen'
 gem 'mercenary'
-gem 'rack', '~> 2.2.4'
+gem 'rack', '~> 2.2.5'
 gem 'railties', '>= 5.2.2.1'
 gem 'rouge'
 gem 'rubocop'
diff --git a/Gemfile.lock b/Gemfile.lock
index 993ebe9..0469abc 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -192,7 +192,7 @@ GEM
       forwardable-extended (~> 2.6)
     public_suffix (5.0.0)
     racc (1.6.1)
-    rack (2.2.4)
+    rack (2.2.5)
     rack-test (2.0.2)
       rack (>= 1.3)
     rails-dom-testing (2.0.3)
@@ -285,7 +285,7 @@ DEPENDENCIES
   mini_racer (~> 0.6.3)
   minima
   nokogiri (>= 1.10.4)
-  rack (~> 2.2.4)
+  rack (~> 2.2.5)
   railties (>= 5.2.2.1)
   rouge
   rubocop