diff --git a/lib/open_food_network/xero_invoices_report.rb b/lib/open_food_network/xero_invoices_report.rb
index 02edcb28c0..34d3c93fb9 100644
--- a/lib/open_food_network/xero_invoices_report.rb
+++ b/lib/open_food_network/xero_invoices_report.rb
@@ -4,6 +4,7 @@ module OpenFoodNetwork
       @user = user
 
       @opts = opts.
+        symbolize_keys.
         reject { |_k, v| v.blank? }.
         reverse_merge( report_type: 'summary',
                        invoice_date: Time.zone.today,