diff --git a/Gemfile b/Gemfile
index 0cda81d..26f1876 100644
--- a/Gemfile
+++ b/Gemfile
@@ -4,7 +4,7 @@ source 'https://rubygems.org'
 
 gemspec
 
-gem 'rack', '2.2.6.4'
+gem 'rack', '2.2.8.1'
 
 gem 'capybara', '>= 3.35.0'
 gem 'cuprite', '>= 0.14.0'
diff --git a/Gemfile.lock b/Gemfile.lock
index 6ee5f04..1bb9631 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -45,7 +45,7 @@ GEM
       ast (~> 2.4.1)
     public_suffix (5.0.1)
     racc (1.6.2)
-    rack (2.2.6.4)
+    rack (2.2.8.1)
     rack-test (2.0.2)
       rack (>= 1.3)
     rainbow (3.1.1)
@@ -99,7 +99,7 @@ DEPENDENCIES
   capybara (>= 3.35.0)
   capybara_mock!
   cuprite (>= 0.14.0)
-  rack (= 2.2.6.4)
+  rack (= 2.2.8.1)
   rake (~> 13.0)
   rspec (~> 3.0)
   rubocop (~> 1.21)