diff --git a/Gemfile b/Gemfile
index 6b03f310..591858f8 100644
--- a/Gemfile
+++ b/Gemfile
@@ -10,7 +10,7 @@ gem "nokogiri", '~> 1.10.4'
 gem 'daemons', :group => [:services]
 gem 'rake', :group => [:development, :test]
 gem 'ffi', '~> 1.9.24'
-gem 'rack', '~> 2.0.6', :group => [:development, :web]
+gem 'rack', '~> 2.1.4', :group => [:development, :web]
 
 group :development do
   gem 'pry'
diff --git a/Gemfile.lock b/Gemfile.lock
index 3b6360bc..d6cf425a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -75,7 +75,7 @@ GEM
       spoon (~> 0.0)
     puma (3.12.2)
     puma (3.12.2-java)
-    rack (2.0.8)
+    rack (2.1.4)
     rack-protection (2.0.7)
       rack
     rack-test (1.1.0)
@@ -135,7 +135,7 @@ DEPENDENCIES
   nokogiri (~> 1.10.4)
   pry
   puma (~> 3.12.2)
-  rack (~> 2.0.6)
+  rack (~> 2.1.4)
   rack-protection (~> 2.0.0)
   rack-test
   rake