diff --git a/app/controllers/invoice_controller.rb b/app/controllers/invoice_controller.rb
index beff2cc..203f1a4 100644
--- a/app/controllers/invoice_controller.rb
+++ b/app/controllers/invoice_controller.rb
@@ -23,10 +23,5 @@ class InvoiceController < ApplicationController
     invoice = base.fetch_by_id(params[:id])
     @pdf = base.pdf(invoice)
     send_data @pdf, filename: "invoice #{invoice.doc_number}.pdf", :disposition => 'inline', :type => "application/pdf"
-
-    Thread.new do
-      QboInvoice.sync_by_id params[:id]
-      ActiveRecord::Base.connection.close
-    end
   end
 end