diff --git a/Gemfile b/Gemfile
index 697b016..4cec03c 100644
--- a/Gemfile
+++ b/Gemfile
@@ -6,7 +6,7 @@ gem 'rails', '~> 6.0.3'
 
 # WebServer
 gem 'puma', '~> 4.3'
-gem 'rack', '~> 2.2.3'
+gem 'rack', '~> 2.2.6'
 gem 'rack-cors', '~> 1.1.1'
 
 # Database
diff --git a/Gemfile.lock b/Gemfile.lock
index 8ccc13e..8cff546 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -200,7 +200,7 @@ GEM
     public_suffix (4.0.3)
     puma (4.3.5)
       nio4r (~> 2.0)
-    rack (2.2.3)
+    rack (2.2.6.2)
     rack-cors (1.1.1)
       rack (>= 2.0.0)
     rack-test (1.1.0)
@@ -370,7 +370,7 @@ DEPENDENCIES
   pagy (~> 3.8)
   pg (~> 1.2.3)
   puma (~> 4.3)
-  rack (~> 2.2.3)
+  rack (~> 2.2.6)
   rack-cors (~> 1.1.1)
   rails (~> 6.0.3)
   ransack (~> 2.3.2)