   def prod_deps(conn, %{"provider" => provider, "name" => name, "branch" => branch, "style" => style}) do
     #badge_source = nil # TODO: load from cache
     #if is_nil(badge_source) do
-      badge_source = perform_prod_deps(conn, %{"provider" => provider, "name" => name, "branch" => branch, "style" => style})
+      {badge_source, build} = perform_prod_deps(conn, %{"provider" => provider, "name" => name, "branch" => branch, "style" => style})
       # TODO: put into cache
     #end
 
     conn
+    |> set_resp_headers(build)
     |> put_resp_content_type("image/svg+xml")
     |> send_resp(200, badge_source)
   end

      bar_width: @bar_width,
      percentages_and_grades: percentages_and_grades
    ]
    render_badge_to_string(:all_deps, to_style(style), assigns)
  end

  #

      bar_width: @bar_width,
      percentages_and_grades: percentages_and_grades
    ]
    badge_source = render_badge_to_string(:prod_deps, to_style(style), assigns)

    {badge_source, build}
  end

  #
