diff --git a/lib/keila/mailings/send_double_opt_in_mail_worker.ex b/lib/keila/mailings/send_double_opt_in_mail_worker.ex
index 65a6c6f0..c7afe411 100644
--- a/lib/keila/mailings/send_double_opt_in_mail_worker.ex
+++ b/lib/keila/mailings/send_double_opt_in_mail_worker.ex
@@ -57,8 +57,8 @@ defmodule Keila.Mailings.SendDoubleOptInMailWorker do
     default_styles = Keila.Templates.HybridTemplate.styles()
 
     styles =
-      if template do
-        Keila.Templates.Css.merge(default_styles, template.styles)
+      if template && is_binary(template.styles) do
+        Keila.Templates.Css.merge(default_styles, Keila.Templates.Css.parse!(template.styles))
       else
         default_styles
       end