diff --git a/app/models/experiment.rb b/app/models/experiment.rb
index 9f9b0d629..86671e8c8 100644
--- a/app/models/experiment.rb
+++ b/app/models/experiment.rb
@@ -13,7 +13,7 @@ class Experiment < ActiveRecord::Base
   has_many :my_module_groups, inverse_of: :experiment, dependent: :destroy
   has_many :report_elements, inverse_of: :experiment, dependent: :destroy
 
-  has_attached_file :workflowimg, styles: { medium: '300x300>' }
+  has_attached_file :workflowimg
   validates_attachment_content_type :workflowimg, content_type: /\Aimage\/.*\Z/
 
   validates :name,
diff --git a/app/views/projects/show/_experiment.html.erb b/app/views/projects/show/_experiment.html.erb
index f32d2c69b..36b576b0f 100644
--- a/app/views/projects/show/_experiment.html.erb
+++ b/app/views/projects/show/_experiment.html.erb
@@ -36,7 +36,7 @@
     <div class="panel-body">
       <% if experiment.workflowimg? %>
         <div class="workflowimg-container">
-          <%= link_to image_tag(experiment.workflowimg,
+          <%= link_to image_tag(experiment.workflowimg.expiring_url(30),
                                 class: 'img-responsive center-block'),
                       canvas_experiment_path(experiment) %>
         </div>