diff --git a/Gemfile b/Gemfile
index b4a0967b..d5b42d83 100644
--- a/Gemfile
+++ b/Gemfile
@@ -23,6 +23,7 @@ gem 'pg'
 gem 'pundit'
 gem 'pundit_extra'
 gem 'rack-cors'
+gem 'rack-attack'
 gem 'redis'
 gem 'slack-notifier'
 gem 'snorlax'
diff --git a/Gemfile.lock b/Gemfile.lock
index 7e2590c1..23d4c827 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -177,6 +177,8 @@ GEM
       activesupport (>= 3.0.0)
     pundit_extra (0.3.0)
     rack (2.0.1)
+    rack-attack (5.0.1)
+      rack
     rack-cors (0.4.0)
     rack-test (0.6.3)
       rack (>= 1.0)
@@ -316,6 +318,7 @@ DEPENDENCIES
   pry-rails
   pundit
   pundit_extra
+  rack-attack
   rack-cors
   rails (~> 5.0.0)
   rails3-jquery-autocomplete