diff --git a/Gemfile b/Gemfile
old mode 100755
new mode 100644
index 0992f441e..7a7db703e
--- a/Gemfile
+++ b/Gemfile
@@ -8,7 +8,7 @@ gem 'i18n',               "~> 0.6.4"
 gem "s3_website",         "~> 3.1.0"
 
 group :app do
-  gem "rack",               "~> 1.5.2"
+  gem "rack",               "~> 2.2.23"
   gem "rake",               "~> 10.1.0"
   gem "sass",               "~> 3.2.5"
   gem 'bourbon',            "~> 3.1.1"
diff --git a/Gemfile.lock b/Gemfile.lock
index 9ccff76c3..3b1e84d7e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -92,7 +92,7 @@ GEM
       coderay (~> 1.0.5)
       method_source (~> 0.8)
       slop (~> 3.4)
-    rack (1.5.2)
+    rack (2.2.23)
     rack-livereload (0.3.15)
       rack
     rack-nocache (0.1.0)
@@ -135,7 +135,7 @@ DEPENDENCIES
   kramdown (~> 1.3.0)
   mustache (~> 0.99.4)
   neat (~> 1.2.0)
-  rack (~> 1.5.2)
+  rack (~> 2.2.23)
   rack-livereload (~> 0.3.15)
   rack-nocache (~> 0.1.0)
   rake (~> 10.1.0)