diff --git a/app/mailers/assignment_response_mailer.rb b/app/mailers/assignment_response_mailer.rb
index 3e9e9ad..956927c 100644
--- a/app/mailers/assignment_response_mailer.rb
+++ b/app/mailers/assignment_response_mailer.rb
@@ -6,7 +6,7 @@ def notify_user_response(assignment_response)
     return if assignment_response.blank?
 
     assignment_response.assignment_question_responses.each do |response|
-      attachments[response.file.original_filename] = response.file.download
+      attachments[response.file.original_filename] = response.file.read
     end
 
     mail(