diff --git a/app/mailers/application_mailer.rb b/app/mailers/application_mailer.rb
index 94ffc99..73ed689 100644
--- a/app/mailers/application_mailer.rb
+++ b/app/mailers/application_mailer.rb
@@ -12,6 +12,6 @@ class ApplicationMailer < ActionMailer::Base
 
   def inline_logo!
     attachments.inline['logo.png'] ||=
-      File.read('app/assets/images/logo.png')
+      File.read(Rails.root.join('app', 'assets', 'images', 'logo.png'))
   end
 end