diff --git a/Gemfile b/Gemfile
index 561e57d..55b68d1 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,5 +1,5 @@
 source "https://rubygems.org"
 gem "github-pages"
 gem 'nokogiri'
-gem 'rack', '~> 2.0.1'
+gem 'rack', '~> 2.1.4'
 gem 'rspec'
\ No newline at end of file
diff --git a/Gemfile.lock b/Gemfile.lock
index 833aab6..185632c 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -204,7 +204,7 @@ GEM
     pathutil (0.16.1)
       forwardable-extended (~> 2.6)
     public_suffix (2.0.5)
-    rack (2.0.3)
+    rack (2.1.4)
     rb-fsevent (0.10.2)
     rb-inotify (0.9.10)
       ffi (>= 0.5.0, < 2)
@@ -249,7 +249,7 @@ PLATFORMS
 DEPENDENCIES
   github-pages
   nokogiri
-  rack (~> 2.0.1)
+  rack (~> 2.1.4)
   rspec
 
 BUNDLED WITH