diff --git a/app/services/invoice_renderer.rb b/app/services/invoice_renderer.rb
index bbb1886a5b..956550d51b 100644
--- a/app/services/invoice_renderer.rb
+++ b/app/services/invoice_renderer.rb
@@ -5,7 +5,7 @@ class InvoiceRenderer
 
   def render_to_string(order)
     renderer.instance_variable_set(:@order, order)
-    renderer.render_to_string(args(order))
+    renderer.render_to_string_with_wicked_pdf(args(order))
   end
 
   def args(order)
diff --git a/spec/services/invoice_renderer_spec.rb b/spec/services/invoice_renderer_spec.rb
index dfa72c4fc1..cb861d2da6 100644
--- a/spec/services/invoice_renderer_spec.rb
+++ b/spec/services/invoice_renderer_spec.rb
@@ -20,7 +20,7 @@ describe InvoiceRenderer do
     it 'uses the invoice2 template' do
       renderer = instance_double(ApplicationController)
       expect(renderer)
-        .to receive(:render_to_string)
+        .to receive(:render_to_string_with_wicked_pdf)
         .with(include(template: 'spree/admin/orders/invoice2'))
 
       described_class.new(renderer).render_to_string(order)
@@ -38,7 +38,7 @@ describe InvoiceRenderer do
     it 'uses the invoice template' do
       renderer = instance_double(ApplicationController)
       expect(renderer)
-        .to receive(:render_to_string)
+        .to receive(:render_to_string_with_wicked_pdf)
         .with(include(template: 'spree/admin/orders/invoice'))
 
       described_class.new(renderer).render_to_string(order)