diff --git a/types/email-templates/email-templates-tests.ts b/types/email-templates/email-templates-tests.ts
index a3311d6e81..3d828281af 100644
--- a/types/email-templates/email-templates-tests.ts
+++ b/types/email-templates/email-templates-tests.ts
@@ -2,13 +2,20 @@ import EmailTemplates = require('email-templates');
 
 const email = new EmailTemplates({
     message: {
-    from: 'Test@tesitng.com'
+      from: 'Test@testing.com'
     },
     transport: {
         jsonTransport: true
-    }}
-);
+    }
+});
+
+const emailNoTransporter = new EmailTemplates({
+    message: {
+      from: 'test@testing.com'
+    },
+});
 
 email.juiceResources('<p>bob</p><style>div{color:red;}</style><div/>');
 email.render('mars/html.pug', {name: 'elon'});
 email.send({template: 'mars', message: {to: 'elon@spacex.com'}, locals: {name: 'Elon'}});
+emailNoTransporter.render('mars/html.pug', {name: 'elon'});
diff --git a/types/email-templates/index.d.ts b/types/email-templates/index.d.ts
index 12dceb181d..1cdd43c36e 100644
--- a/types/email-templates/index.d.ts
+++ b/types/email-templates/index.d.ts
@@ -1,4 +1,4 @@
-// Type definitions for node-email-templates 3.1
+// Type definitions for node-email-templates 3.5
 // Project: https://github.com/niftylettuce/node-email-templates
 // Definitions by: Cyril Schumacher <https://github.com/cyrilschumacher>
 //                 Matus Gura <https://github.com/gurisko>
@@ -13,7 +13,7 @@ interface EmailConfig {
     /**
      * The nodemailer Transport created via nodemailer.createTransport
      */
-    transport: any;
+    transport?: any;
     /**
      * The email template directory and engine information
      */
@@ -34,10 +34,19 @@ interface EmailConfig {
      * Pass a custom render function if necessary
      */
     render?: { view: string, locals: any };
+    /**
+     * force text-only rendering of template (disregards template folder)
+     */
+    textOnly?: boolean;
     /**
      * <Https://github.com/werk85/node-html-to-text>
      */
     htmlToText?: any;
+    /**
+     * You can pass an option to prefix subject lines with a string
+     * env === 'production' ? false : `[${env.toUpperCase()}] `; // <--- HERE
+     */
+    subjectPrefix?: any;
     /**
      * <https://github.com/Automattic/juice>
      */