diff --git a/app/controllers/attachments_controller.rb b/app/controllers/attachments_controller.rb
index a668a0691..8a599cb04 100644
--- a/app/controllers/attachments_controller.rb
+++ b/app/controllers/attachments_controller.rb
@@ -39,7 +39,7 @@ class AttachmentsController < ApplicationController
     value = Rails.cache.read(cache_key)
     if value.to_i >= 5 && File.exist?(tmp_path)
       filepath, ref = url.split("/")[-1].split("?")
-      send_data(tmp_path, filename: filepath, stream:false, type: 'application/octet-stream')
+      send_file(tmp_path, filename: filepath, stream:false, type: 'application/octet-stream')
     else
       if url.starts_with?(base_url) && !url.starts_with?("#{base_url}/repo")
         domain  = GiteaService.gitea_config[:domain]