diff --git a/web/templates/layout/email.html.eex b/web/templates/layout/email.html.eex
index ef5bcf0..5042d34 100644
--- a/web/templates/layout/email.html.eex
+++ b/web/templates/layout/email.html.eex
@@ -1,7 +1,7 @@
-<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional //EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
-<html xmlns="http://www.w3.org/1999/xhtml">
+<!DOCTYPE html>
+<html lang="en">
   <head>
-    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /  >
+    <meta charset="utf-8" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0"/>
     <title><%= @email.subject %></title>
   </head>
