diff --git a/app/assets/javascripts/osem-dashboard.js b/app/assets/javascripts/osem-dashboard.js
index c8d5b853..83d2b468 100644
--- a/app/assets/javascripts/osem-dashboard.js
+++ b/app/assets/javascripts/osem-dashboard.js
@@ -55,7 +55,6 @@ $(function() {
     }
 
     function draw_line_chart(animation, $canvas){
-        var options = get_animation({}, animation);
         var chart_data = create_dataset($canvas);
         var weeks = $canvas.parent().data('weeks');
         var data = {
@@ -63,10 +62,27 @@ $(function() {
             datasets : chart_data
         }
 
+        var options = get_animation(wholeNumberAxisFix(data), animation);
         var ctx = $canvas.get(0).getContext("2d");
         new Chart(ctx).Line(data, options);
     }
 
+    function wholeNumberAxisFix(data){
+        var maxValue = false;
+        for(datasetIndex = 0; datasetIndex < data.datasets.length; ++datasetIndex){
+            var setMax = Math.max.apply(null, data.datasets[datasetIndex].data);
+            if (maxValue === false || setMax > maxValue) maxValue = setMax;
+        }
+
+        var steps = maxValue;
+        var stepWidth = 1;
+        if (maxValue > 10) {
+            stepWidth = Math.floor(maxValue / 10);
+            steps = Math.ceil(maxValue / stepWidth);
+        }
+        return { scaleOverride: true, scaleSteps: steps, scaleStepWidth: stepWidth, scaleStartValue: 0 };
+    }
+
     function create_dataset($canvas){
         var selected = getSelectedConferences($canvas);
         var chart_data = $canvas.parent().data('chart');
diff --git a/app/assets/stylesheets/osem.css.scss b/app/assets/stylesheets/osem.css.scss
index 5a331436..79768c5d 100644
--- a/app/assets/stylesheets/osem.css.scss
+++ b/app/assets/stylesheets/osem.css.scss
@@ -94,3 +94,13 @@ p.comment-body {
 .box{
   height: 230px;
 }
+
+/* sidebar hamburger btn */
+.side-nav-btn{
+ margin-left: 10px;
+ float: left;
+ }
+
+.qr-image{
+  margin-left: 120px;
+}
diff --git a/app/controllers/physical_ticket_controller.rb b/app/controllers/physical_ticket_controller.rb
index fb25ae63..af02155c 100644
--- a/app/controllers/physical_ticket_controller.rb
+++ b/app/controllers/physical_ticket_controller.rb
@@ -13,6 +13,7 @@ class PhysicalTicketController < ApplicationController
     @file_name = "ticket_for_#{@conference.short_title}"
     @user = @physical_ticket.user
     @ticket_layout = @conference.ticket_layout.to_sym
+    @qrcode_image = RQRCode::QRCode.new(@physical_ticket.token).as_png(size: 180, border_modules: 0)
     respond_to do |format|
       format.html
       format.pdf do
diff --git a/app/controllers/ticket_purchases_controller.rb b/app/controllers/ticket_purchases_controller.rb
index 792122e2..f15fc993 100644
--- a/app/controllers/ticket_purchases_controller.rb
+++ b/app/controllers/ticket_purchases_controller.rb
@@ -2,6 +2,7 @@ class TicketPurchasesController < ApplicationController
   before_filter :authenticate_user!
   load_resource :conference, find_by: :short_title
   authorize_resource :conference_registrations, class: Registration
+  authorize_resource
 
   def create
     current_user.ticket_purchases.by_conference(@conference).unpaid.destroy_all
diff --git a/app/pdfs/ticket_pdf.rb b/app/pdfs/ticket_pdf.rb
index 1c26ec77..ecb4cd2c 100644
--- a/app/pdfs/ticket_pdf.rb
+++ b/app/pdfs/ticket_pdf.rb
@@ -77,5 +77,9 @@ class TicketPdf < Prawn::Document
     move_up 180
   end
 
-  def draw_fourth_square; end
+  def draw_fourth_square
+    x = @mid_horizontal + (@right - @mid_horizontal - 180) / 2
+    y = cursor - (bounds.top - @mid_vertical - 180) / 2
+    print_qr_code(@physical_ticket.token, pos: [x, y], extent: 180, stroke: false)
+  end
 end
diff --git a/app/views/layouts/_admin_sidebar.html.haml b/app/views/layouts/_admin_sidebar.html.haml
index 1c7bac9a..28ef62e2 100644
--- a/app/views/layouts/_admin_sidebar.html.haml
+++ b/app/views/layouts/_admin_sidebar.html.haml
@@ -1,4 +1,4 @@
-%ul.nav.nav-stacked.nav-pills.mySidebar
+%ul.nav.nav-stacked.nav-pills.mySidebar.collapse.navbar-collapse#side-nav
   .btn-group
     %button{type:'button', class: 'btn btn-default btn-link dropdown-toggle', 'data-toggle'=>'dropdown'}
       %span.fa.fa-cog
diff --git a/app/views/layouts/_navigation.html.haml b/app/views/layouts/_navigation.html.haml
index 9750be92..9995123b 100644
--- a/app/views/layouts/_navigation.html.haml
+++ b/app/views/layouts/_navigation.html.haml
@@ -1,7 +1,13 @@
 .navbar.navbar-default.navbar-fixed-top.nav-osem{role: 'navigation'}
   .container
     .navbar-header
-      %button{"data-target"=>".navbar-collapse", "data-toggle"=>"collapse", class: 'navbar-toggle', type: 'button'}
+      - if @conference && @conference.short_title.present?
+        %button{ "data-target"=>"#side-nav", "data-toggle"=>"collapse", class: 'navbar-toggle side-nav-btn', type: 'button' }
+          %span.sr-only Toggle navigation
+          %span.icon-bar
+          %span.icon-bar
+          %span.icon-bar
+      %button{"data-target"=>"#main-nav", "data-toggle"=>"collapse", class: 'navbar-toggle', type: 'button'}
         %span.sr-only
           Toggle navigation
         %span.icon-bar
@@ -11,7 +17,7 @@
         = link_to (ENV['OSEM_NAME'] || 'OSEM'), root_path, class: 'navbar-brand', title: 'Open Source Event Manager'
       - else
         = link_to conference.organization.name, organizations_path, class: 'navbar-brand', title: 'Open Source Event Manager'
-    .collapse.navbar-collapse
+    .collapse.navbar-collapse#main-nav
       - if content_for :splash_nav
         %ul.nav.navbar-nav#splash-nav
           = content_for :splash_nav
diff --git a/app/views/physical_ticket/show.html.haml b/app/views/physical_ticket/show.html.haml
index 067f0a9b..40513ae8 100644
--- a/app/views/physical_ticket/show.html.haml
+++ b/app/views/physical_ticket/show.html.haml
@@ -67,6 +67,7 @@
         = @physical_ticket.ticket_purchase.id
         %br
     .col-md-5.col-md-offset-2.box.well
+      = image_tag(@qrcode_image.to_data_url, class: 'img-responsive qr-image')
   .row
     .col-md-12
       %p.text-left