diff --git a/Gemfile b/Gemfile
index 634887f..a861767 100644
--- a/Gemfile
+++ b/Gemfile
@@ -55,7 +55,7 @@ group :development, :test do
 end
 
 # Airbrake
-gem 'airbrake'
+gem 'airbrake', '~> 4'
 
 # Paginate stuff
 gem 'will_paginate',           '3.0.7'
@@ -66,7 +66,7 @@ gem 'paperclip'
 
 # Use devise for users and admins
 gem 'devise'
-gem 'omniauth-oauth2'
+gem 'omniauth-oauth2', '1.3.1'
 
 # Use cancancan for authorization
 gem 'cancancan'
diff --git a/Gemfile.lock b/Gemfile.lock
index 810cdc3..a8d04da 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -39,8 +39,8 @@ GEM
     airbrake (4.3.4)
       builder
       multi_json
-    annotate (2.6.10)
-      activerecord (>= 3.2, <= 4.3)
+    annotate (2.7.0)
+      activerecord (>= 3.2, < 6.0)
       rake (~> 10.4)
     arel (6.0.3)
     bcrypt (3.1.10)
@@ -58,7 +58,7 @@ GEM
     capistrano-bundler (1.1.4)
       capistrano (~> 3.1)
       sshkit (~> 1.2)
-    capistrano-passenger (0.1.1)
+    capistrano-passenger (0.2.0)
       capistrano (~> 3.0)
     capistrano-rails (1.1.5)
       capistrano (~> 3.1)
@@ -77,14 +77,13 @@ GEM
     codeclimate-test-reporter (0.4.8)
       simplecov (>= 0.7.1, < 1.0.0)
     coderay (1.1.0)
-    coffee-rails (4.1.0)
+    coffee-rails (4.1.1)
       coffee-script (>= 2.2.0)
-      railties (>= 4.0.0, < 5.0)
+      railties (>= 4.0.0, < 5.1.x)
     coffee-script (2.4.1)
       coffee-script-source
       execjs
     coffee-script-source (1.10.0)
-    colorize (0.7.7)
     coveralls (0.8.10)
       json (~> 1.8)
       rest-client (>= 1.6.8, < 2)
@@ -98,7 +97,7 @@ GEM
     delayed_job_active_record (4.1.0)
       activerecord (>= 3.0, < 5)
       delayed_job (>= 3.0, < 5)
-    devise (3.5.2)
+    devise (3.5.3)
       bcrypt (~> 3.0)
       orm_adapter (~> 0.1)
       railties (>= 3.2.6, < 5)
@@ -170,11 +169,11 @@ GEM
     mysql2 (0.4.2-x64-mingw32)
     net-scp (1.2.1)
       net-ssh (>= 2.6.5)
-    net-ssh (3.0.1)
+    net-ssh (3.0.2)
     netrc (0.11.0)
-    nokogiri (1.6.7)
+    nokogiri (1.6.7.1)
       mini_portile2 (~> 2.0.0.rc2)
-    nokogiri (1.6.7-x64-mingw32)
+    nokogiri (1.6.7.1-x64-mingw32)
       mini_portile2 (~> 2.0.0.rc2)
     oauth2 (1.0.0)
       faraday (>= 0.8, < 0.10)
@@ -182,10 +181,10 @@ GEM
       multi_json (~> 1.3)
       multi_xml (~> 0.5)
       rack (~> 1.2)
-    omniauth (1.2.2)
+    omniauth (1.3.1)
       hashie (>= 1.2, < 4)
-      rack (~> 1.0)
-    omniauth-oauth2 (1.4.0)
+      rack (>= 1.0, < 3)
+    omniauth-oauth2 (1.3.1)
       oauth2 (~> 1.0)
       omniauth (~> 1.2)
     orm_adapter (0.5.0)
@@ -229,9 +228,10 @@ GEM
       rake (>= 0.8.7)
       thor (>= 0.18.1, < 2.0)
     rake (10.4.2)
-    rdoc (4.2.0)
-    responders (2.1.0)
-      railties (>= 4.2.0, < 5)
+    rdoc (4.2.1)
+      json (~> 1.4)
+    responders (2.1.1)
+      railties (>= 4.2.0, < 5.1)
     rest-client (1.8.0)
       http-cookie (>= 1.0.2, < 2.0)
       mime-types (>= 1.16, < 3.0)
@@ -270,13 +270,13 @@ GEM
       json (~> 1.7, >= 1.7.7)
       rdoc (~> 4.0)
     sexp_processor (4.6.0)
-    simplecov (0.11.0)
+    simplecov (0.11.1)
       docile (~> 1.1.0)
       json (~> 1.8)
       simplecov-html (~> 0.10.0)
     simplecov-html (0.10.0)
     slop (3.6.0)
-    spring (1.5.0)
+    spring (1.6.1)
     sprockets (2.12.4)
       hike (~> 1.2)
       multi_json (~> 1.0)
@@ -288,8 +288,7 @@ GEM
       sprockets (>= 2.8, < 4.0)
     sqlite3 (1.3.11)
     sqlite3 (1.3.11-x64-mingw32)
-    sshkit (1.7.1)
-      colorize (>= 0.7.0)
+    sshkit (1.8.1)
       net-scp (>= 1.1.2)
       net-ssh (>= 2.8.0)
     term-ansicolor (1.3.2)
@@ -309,7 +308,7 @@ GEM
       unf_ext
     unf_ext (0.0.7.1)
     unf_ext (0.0.7.1-x64-mingw32)
-    warden (1.2.3)
+    warden (1.2.4)
       rack (>= 1.0)
     will_paginate (3.0.7)
 
@@ -318,7 +317,7 @@ PLATFORMS
   x64-mingw32
 
 DEPENDENCIES
-  airbrake
+  airbrake (~> 4)
   annotate
   bootstrap-sass (= 3.2.0.0)
   bootstrap-will_paginate (= 0.0.10)
@@ -342,7 +341,7 @@ DEPENDENCIES
   identicon
   jquery-rails
   mysql2
-  omniauth-oauth2
+  omniauth-oauth2 (= 1.3.1)
   paperclip
   pry-rails
   rails (= 4.2.4)
diff --git a/app/assets/stylesheets/overview.css.scss b/app/assets/stylesheets/overview.css.scss
index 37b2b72..b62f65f 100644
--- a/app/assets/stylesheets/overview.css.scss
+++ b/app/assets/stylesheets/overview.css.scss
@@ -20,7 +20,6 @@
   }
 }
 
-.warning {
-  border: 2px solid;
+.guest {
   margin-bottom: 20px;
 }
diff --git a/app/controllers/welcome_controller.rb b/app/controllers/welcome_controller.rb
index 6fff436..bfd4737 100644
--- a/app/controllers/welcome_controller.rb
+++ b/app/controllers/welcome_controller.rb
@@ -8,9 +8,9 @@ class WelcomeController < ApplicationController
     if user_signed_in? || params[:token] != Rails.application.secrets.koelkast_token
       redirect_to root_path
       return
-    else
-      koelkast = User.find_by(name: "koelkast")
-      sign_in_and_redirect koelkast
     end
+
+    koelkast = User.koelkast
+    sign_in_and_redirect koelkast
   end
 end
diff --git a/app/models/ability.rb b/app/models/ability.rb
index c489408..17d3ced 100644
--- a/app/models/ability.rb
+++ b/app/models/ability.rb
@@ -4,7 +4,7 @@ class Ability
   def initialize(user)
     return unless user
 
-    initialize_admin if user.admin?
+    initialize_admin    if user.admin?
     initialize_koelkast if user.koelkast?
     initialize_user(user)
 
diff --git a/app/models/barcode.rb b/app/models/barcode.rb
index 80e595f..1e03f54 100644
--- a/app/models/barcode.rb
+++ b/app/models/barcode.rb
@@ -16,5 +16,5 @@ class Barcode < ActiveRecord::Base
   belongs_to :product
 
   validates :product, presence: true
-  validates :code, presence: true, uniqueness: true
+  validates :code,    presence: true, uniqueness: true
 end
diff --git a/app/models/product.rb b/app/models/product.rb
index 2128b62..497f64a 100644
--- a/app/models/product.rb
+++ b/app/models/product.rb
@@ -21,7 +21,7 @@ class Product < ActiveRecord::Base
   include Avatarable
 
   has_many :order_items
-  has_many :barcodes
+  has_many :barcodes, dependent: :destroy
   accepts_nested_attributes_for :barcodes
 
   enum category: %w(food beverages other)
diff --git a/app/models/user.rb b/app/models/user.rb
index 5f035fd..af1ab09 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -56,6 +56,8 @@ class User < ActiveRecord::Base
     end
   end
 
+  # Static Users
+
   def self.guest
     @guest || find_or_create_by(name: "Guest") do |user|
       user.avatar = File.new(File.join("app", "assets", "images", "guest.png"))
@@ -65,4 +67,11 @@ class User < ActiveRecord::Base
   def guest?
     self == User.guest
   end
+
+  def self.koelkast
+    @koelkast || find_or_create_by(name: "Koelkast") do |user|
+      user.avatar   = File.new(File.join("app", "assets", "images", "logo.png"))
+      user.koelkast = true
+    end
+  end
 end
diff --git a/app/views/orders/overview.html.haml b/app/views/orders/overview.html.haml
index a6d3d3d..2407cb4 100644
--- a/app/views/orders/overview.html.haml
+++ b/app/views/orders/overview.html.haml
@@ -1,13 +1,12 @@
-.warning.center
-  %h1 TESTFASE | GELIEVE STREEPJES TE BLIJVEN ZETTEN | TESTFASE
 .row
   .col-md-1
-    %h5 Recent
-    #last
-      - @last.each do |user|
-        = image_tag user.avatar(:small), class: "img-responsive img-circle img-thumbnail"
+    - unless @last.empty?
+      %h5 Recent
+      #last
+        - @last.each do |user|
+          = image_tag user.avatar(:small), class: "img-responsive img-circle img-thumbnail"
   .col-md-11
-    .row.text-center
-      =link_to "Not a Zeus Account? Order as a guest.", new_guest_order_path, class: "btn btn-primary btn-lg"
+    .row.text-center.guest
+      =link_to "Not a Zeus Account? Order as a guest.", new_guest_order_path, class: "btn btn-default btn-lg"
     .row
     = render @users