diff --git a/Gemfile b/Gemfile
index d2774f5..4933120 100644
--- a/Gemfile
+++ b/Gemfile
@@ -6,7 +6,7 @@ end
 ruby '3.0.6'
 # gem 'bundler', '~> 2.1.4'
 gem 'sinatra', '~> 3.0.4'
-gem 'rack', '~> 2.2.6.4'
+gem 'rack', '~> 2.2.8.1'
 gem 'rails', '~> 6.1.7.5'
 gem 'puma', '>= 5.6.7'
 gem 'puma_worker_killer'
diff --git a/Gemfile.lock b/Gemfile.lock
index 409c18a..ca6f0ce 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -289,7 +289,7 @@ GEM
       get_process_mem (~> 0.2)
       puma (>= 2.7)
     racc (1.7.1)
-    rack (2.2.6.4)
+    rack (2.2.8.1)
     rack-cors (2.0.1)
       rack (>= 2.0.0)
     rack-protection (3.0.6)
@@ -466,7 +466,7 @@ DEPENDENCIES
   pg
   puma (>= 5.6.7)
   puma_worker_killer
-  rack (~> 2.2.6.4)
+  rack (~> 2.2.8.1)
   rack-cors
   rails (~> 6.1.7.5)
   rails-html-sanitizer (~> 1.5.0)