diff --git a/config/environments/production.rb b/config/environments/production.rb
index 52d8de6..12bc4ee 100644
--- a/config/environments/production.rb
+++ b/config/environments/production.rb
@@ -24,7 +24,7 @@
   # config.assets.manifest = YOUR_PATH
 
   # Specifies the header that your server uses for sending files
-  config.action_dispatch.x_sendfile_header = nil # For Heroku
+  config.action_dispatch.x_sendfile_header = 'X-Accel-Redirect' # For Heroku
   # config.action_dispatch.x_sendfile_header = "X-Sendfile" # for apache
   # config.action_dispatch.x_sendfile_header = 'X-Accel-Redirect' # for nginx