diff --git a/lib/outlook_web/components/html_doc_component.ex b/lib/outlook_web/components/html_doc_component.ex
index 7d265a2..72b5951 100644
--- a/lib/outlook_web/components/html_doc_component.ex
+++ b/lib/outlook_web/components/html_doc_component.ex
@@ -18,7 +18,7 @@ defmodule OutlookWeb.HtmlDocComponent do
   end
   def render_doc(assigns) do
     assigns
-    |> assign(:tunit_tag,  "span")
+    |> Map.put(:tunit_tag,  "span")
     |> render_doc()
   end