diff --git a/backend/src/emails/templates/layout.pug b/backend/src/emails/templates/layout.pug
index 578a3d1ed..0995b2647 100644
--- a/backend/src/emails/templates/layout.pug
+++ b/backend/src/emails/templates/layout.pug
@@ -2,7 +2,7 @@ doctype html
 html(lang=locale)
   head
     meta(
-      content="multipart/mixed; charset=UTF-8"
+      content="multipart/html; charset=UTF-8"
       http-equiv="content-type"
       )
     meta(