diff --git a/Gemfile b/Gemfile
index e7e492a1af..fd2cb9f712 100644
--- a/Gemfile
+++ b/Gemfile
@@ -87,6 +87,7 @@ gem 'vigilion-rails', '~> 1.0.5'
 gem "sidekiq", "~> 4.1.1"
 gem "sidekiq-cron", "~> 0.4.2"
 gem 'sinatra', require: nil
+gem "rack-protection", "1.5.5" # Sinatra's dependency
 
 # Redis
 gem 'redis-rails'
diff --git a/Gemfile.lock b/Gemfile.lock
index 73897f0035..c993452e84 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -684,6 +684,7 @@ DEPENDENCIES
   pusher
   quiet_assets
   rack-mini-profiler (>= 0.10.1)
+  rack-protection (= 1.5.5)
   rack-ssl-enforcer
   rails (= 4.2.10)
   rails-html-sanitizer (~> 1.0.4)