diff --git a/Gemfile b/Gemfile
index c10abd7..6f6b1bd 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,3 +1,5 @@
 source 'https://rubygems.org'
 
 gem 'sinatra'
+gem "rack", ">= 1.6.11"
+gem "rack-protection", ">= 1.5.5"