diff --git a/Gemfile b/Gemfile
index 33595d8..8967bc7 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,5 +1,5 @@
 source 'https://rubygems.org'
 gem 'nokogiri'
-gem 'rack', '~> 2.0.8'
+gem 'rack', '~> 2.1.4'
 gem 'rspec'
 gem 'cocoapods'
diff --git a/Gemfile.lock b/Gemfile.lock
index a75ff31..b47a5f7 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -59,7 +59,7 @@ GEM
     netrc (0.11.0)
     nokogiri (1.10.4)
       mini_portile2 (~> 2.4.0)
-    rack (2.0.8)
+    rack (2.1.4)
     rspec (3.8.0)
       rspec-core (~> 3.8.0)
       rspec-expectations (~> 3.8.0)
@@ -90,7 +90,7 @@ PLATFORMS
 DEPENDENCIES
   cocoapods
   nokogiri
-  rack (~> 2.0.8)
+  rack (~> 2.1.4)
   rspec
 
 BUNDLED WITH