diff --git a/Gemfile b/Gemfile
index 4a43175c..546f1f85 100755
--- a/Gemfile
+++ b/Gemfile
@@ -17,6 +17,7 @@ gem 'sassc', '~> 2.0', '>= 2.0.1'
 gem 'stripe', '~> 1.58' # January 19, 2017 version of the Stripe API https://stripe.com/docs/api
 gem 'uglifier', '~> 4.1', '>= 4.1.20'
 gem 'ffi', '~> 1.11', '>= 1.11.1'
+gem 'rack', '~> 2.0.9'
 
 gem 'httparty', '~> 0.17.0' # https://github.com/jnunemaker/httparty
 gem 'rack-attack', '~> 5.2' # for blocking ip addressses
diff --git a/Gemfile.lock b/Gemfile.lock
index eede3424..277f7e6b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -331,7 +331,7 @@ GEM
       puma (>= 2.7, < 5)
     rabl (0.14.1)
       activesupport (>= 2.3.14)
-    rack (2.0.7)
+    rack (2.0.9)
     rack-accept (0.4.5)
       rack (>= 0.4)
     rack-attack (5.4.2)
@@ -558,6 +558,7 @@ DEPENDENCIES
   puma_worker_killer (~> 0.1.1)
   qx!
   rabl (~> 0.14.1)
+  rack (~> 2.0.9)
   rack-attack (~> 5.2)
   rack-ssl (~> 1.4)
   rack-timeout (~> 0.5.1)