diff --git a/Gemfile b/Gemfile
index 8d539d5b..a003db28 100644
--- a/Gemfile
+++ b/Gemfile
@@ -12,6 +12,7 @@ gem 'puma', require: nil
 platform :mri do
   gem 'pg'
   gem 'hiredis'
+  gem 'rainbows', require: nil
 
   group :development, :test do
     gem 'pry'
diff --git a/Gemfile.lock b/Gemfile.lock
index 19b3fc06..eb268e17 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -20,6 +20,7 @@ GEM
     hashie (2.0.5)
     hiredis (0.4.5)
     i18n (0.6.4)
+    kgio (2.8.0)
     metaclass (0.0.1)
     method_source (0.8.1)
     minitest (4.7.4)
@@ -49,6 +50,11 @@ GEM
       rack
     rack-test (0.6.2)
       rack (>= 1.0)
+    rainbows (4.5.0)
+      kgio (~> 2.5)
+      rack (~> 1.1)
+      unicorn (~> 4.6, >= 4.6.2)
+    raindrops (0.10.0)
     rake (10.0.4)
     redis (3.0.4)
     sequel (3.47.0)
@@ -72,6 +78,10 @@ GEM
     slop (3.4.5)
     temple (0.6.5)
     tilt (1.4.1)
+    unicorn (4.6.2)
+      kgio (~> 2.6)
+      rack
+      raindrops (~> 0.7)
     webmock (1.11.0)
       addressable (>= 2.2.7)
       crack (>= 0.3.2)
@@ -95,6 +105,7 @@ DEPENDENCIES
   pry-debugger
   puma
   rack-test
+  rainbows
   rake
   redis
   ruby-debug