diff --git a/Gemfile b/Gemfile
index bf0a48e..0efffc4 100644
--- a/Gemfile
+++ b/Gemfile
@@ -25,6 +25,7 @@ group :development do
   gem 'spring'
   gem 'spring-commands-rspec'
   gem 'guard-rspec' # Continuous testing with Guard
+  gem 'rails-erd'
 end
 
 group :development, :test do
diff --git a/Gemfile.lock b/Gemfile.lock
index 7b32b0b..26d4eec 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -38,6 +38,7 @@ GEM
       xpath (~> 2.0)
     celluloid (0.15.2)
       timers (~> 1.1.0)
+    choice (0.1.6)
     coderay (1.1.0)
     coffee-rails (4.0.1)
       coffee-script (>= 2.2.0)
@@ -116,6 +117,11 @@ GEM
       bundler (>= 1.3.0, < 2.0)
       railties (= 4.1.4)
       sprockets-rails (~> 2.0)
+    rails-erd (1.1.0)
+      activerecord (>= 3.0)
+      activesupport (>= 3.0)
+      choice (~> 0.1.6)
+      ruby-graphviz (~> 1.0.4)
     rails-i18n (4.0.2)
       i18n (~> 0.6)
       rails (>= 4.0)
@@ -149,6 +155,7 @@ GEM
       rspec-mocks (~> 3.0.0)
       rspec-support (~> 3.0.0)
     rspec-support (3.0.3)
+    ruby-graphviz (1.0.9)
     sass (3.2.19)
     sass-rails (4.0.3)
       railties (>= 4.0.0, < 5.0)
@@ -215,6 +222,7 @@ DEPENDENCIES
   jquery-rails
   pg
   rails (= 4.1.4)
+  rails-erd
   rails-i18n
   rspec-rails
   sass-rails (~> 4.0.3)