diff --git a/pkg/engagement/infrastructure/services/mail/service.go b/pkg/engagement/infrastructure/services/mail/service.go
index 54fea615..901a0c83 100644
--- a/pkg/engagement/infrastructure/services/mail/service.go
+++ b/pkg/engagement/infrastructure/services/mail/service.go
@@ -240,6 +240,8 @@ func (s ServiceMailImpl) SendMailgun(
 		message.SetHtml(text)
 	}
 
+	message.AddHeader("Content-Type", "text/html; charset=\"utf-8\";")
+
 	ctx, cancel := context.WithTimeout(ctx, time.Second*MailGunTimeoutSeconds)
 	defer cancel()