diff --git a/Gemfile b/Gemfile
index 212d05d..51ce931 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,8 +1,7 @@
 source 'https://rubygems.org'
 
-
 # Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
-gem 'rails', '~> 5.1.4'
+gem 'rails', '~> 5.0.0'
 # Use sqlite3 as the database for Active Record
 # gem 'sqlite3'
 gem 'momentjs-rails', '>= 2.9.0'
@@ -11,7 +10,7 @@ gem 'devise'
 
 gem 'mysql2'
 # Use Puma as the app server
-gem 'puma', '~> 3.7'
+gem 'puma', '~> 3.0'
 # Use SCSS for stylesheets
 gem 'sass-rails', '~> 5.0'
 # Use Uglifier as compressor for JavaScript assets
@@ -32,7 +31,7 @@ gem 'jbuilder', '~> 2.5'
 # gem 'redis', '~> 3.0'
 # Use ActiveModel has_secure_password
 # gem 'bcrypt', '~> 3.1.7'
-
+gem 'cocoon'
 # Use Capistrano for deployment
 # gem 'capistrano-rails', group: :development
 gem 'wicked_pdf'
diff --git a/app/controllers/invoices_controller.rb b/app/controllers/invoices_controller.rb
index 40ba83a..9416980 100644
--- a/app/controllers/invoices_controller.rb
+++ b/app/controllers/invoices_controller.rb
@@ -18,8 +18,8 @@ class InvoicesController < ApplicationController
         margin:  {   top:               8,                     # default 10 (mm)
                      bottom:            8,
                      left:              8,
-                     right:             8 },        
-        viewport_size: '1280x1024'
+                     right:             8 },
+        viewport_size: '1336x1024'
       end
     end
   end