diff --git a/Gemfile b/Gemfile
index 04bd1f1..0f61a59 100644
--- a/Gemfile
+++ b/Gemfile
@@ -3,7 +3,7 @@
 source 'https://rubygems.org'
 
 gem 'puma', '~> 4.3.12'
-gem 'rack', '~> 2.2.3'
+gem 'rack', '~> 2.2.6'
 gem 'rake', '~> 13.0.0', require: false
 
 group :development, :test do
diff --git a/Gemfile.lock b/Gemfile.lock
index 5c4fb60..1c6a411 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -38,7 +38,7 @@ GEM
       method_source (~> 1.0)
     puma (4.3.12)
       nio4r (~> 2.0)
-    rack (2.2.3.1)
+    rack (2.2.6.4)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
     rainbow (3.0.0)
@@ -87,7 +87,7 @@ PLATFORMS
 DEPENDENCIES
   guard-rspec (~> 4.7.0)
   puma (~> 4.3.12)
-  rack (~> 2.2.3)
+  rack (~> 2.2.6)
   rack-test (~> 1.1.0)
   rake (~> 13.0.0)
   rspec (~> 3.9.0)