diff --git a/Gemfile b/Gemfile
index d8a6917..a8d8841 100644
--- a/Gemfile
+++ b/Gemfile
@@ -31,7 +31,7 @@ group :development do
 end
 
 group :test do
-  gem 'rack-test', '~> 2.1'
+  gem 'rack-test', '~> 2.2'
   gem 'rspec', '~> 3.13'
   gem 'simplecov', require: false
   gem 'timecop', '~> 0.9.10'
diff --git a/Gemfile.lock b/Gemfile.lock
index 7b5571e..e62bb25 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -73,7 +73,7 @@ GEM
       rack (>= 3.0.0, < 4)
     rack-session (2.0.0)
       rack (>= 3.0.0)
-    rack-test (2.1.0)
+    rack-test (2.2.0)
       rack (>= 1.3)
     rainbow (3.1.1)
     rake (13.2.1)
@@ -175,7 +175,7 @@ DEPENDENCIES
   json-schema (~> 5.1)
   pry-byebug (~> 3.10, >= 3.10.1)
   puma (~> 6.4)
-  rack-test (~> 2.1)
+  rack-test (~> 2.2)
   rainbow (~> 3.1, >= 3.1.1)
   rake (~> 13.2, >= 13.2.1)
   rerun (~> 0.14.0)