diff --git a/Gemfile b/Gemfile
index c341636..e9319a1 100644
--- a/Gemfile
+++ b/Gemfile
@@ -14,7 +14,7 @@ group :dev do
 end
 
 group :test do
-  gem 'rack', '= 2.2.3'
+  gem 'rack', '2.2.4'
   gem 'simplecov', '= 0.21.2'
   gem 'simplecov-console', '= 0.9.1'
 end
diff --git a/Gemfile.lock b/Gemfile.lock
index 0bb055f..2298f78 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -55,7 +55,7 @@ GEM
     pry-doc (1.3.0)
       pry (~> 0.11)
       yard (~> 0.9.11)
-    rack (2.2.3)
+    rack (2.2.4)
     rainbow (3.1.1)
     rake (13.0.6)
     regexp_parser (2.5.0)
@@ -116,7 +116,7 @@ DEPENDENCIES
   method_source (= 1.0.0)
   pry (= 0.14.1)
   pry-doc (= 1.3.0)
-  rack (= 2.2.3)
+  rack (= 2.2.4)
   rake (= 13.0.6)
   rspec (= 3.11.0)
   rubocop (= 1.28.2)