diff --git a/packages/mail/src/mail.d.ts b/packages/mail/src/mail.d.ts
index 86ed84220..058b5642f 100644
--- a/packages/mail/src/mail.d.ts
+++ b/packages/mail/src/mail.d.ts
@@ -1,7 +1,9 @@
-import Client = require("@sendgrid/client");
 import {ClientResponse} from "@sendgrid/client/src/response";
 import {ResponseError} from "@sendgrid/helpers/classes";
-import {MailData} from "@sendgrid/helpers/classes/mail";
+import {MailContent, MailData} from "@sendgrid/helpers/classes/mail";
+
+type MailDataRequired = MailData & (
+  { text: string } | { html: string } | { content: MailContent[] & { 0: MailContent } });
 
 declare class MailService {
   /**
@@ -17,18 +19,18 @@ declare class MailService {
   /**
    * Send email
    */
-  send(data: MailData, isMultiple?: boolean, cb?: (err: Error|ResponseError, result: [ClientResponse, {}]) => void): Promise<[ClientResponse, {}]>;
+  send(data: MailDataRequired, isMultiple?: boolean, cb?: (err: Error | ResponseError, result: [ClientResponse, {}]) => void): Promise<[ClientResponse, {}]>;
 
   /**
    * Send emails
    */
-  send(data: MailData[], isMultiple?: boolean, cb?: (err: Error|ResponseError, result: [ClientResponse, {}]) => void): Promise<[ClientResponse, {}]>;
+  send(data: MailDataRequired[], isMultiple?: boolean, cb?: (err: Error | ResponseError, result: [ClientResponse, {}]) => void): Promise<[ClientResponse, {}]>;
 
   /**
    * Send multiple emails (shortcut)
    */
-  sendMultiple(data: MailData, cb?: (error: Error|ResponseError, result: [ClientResponse, {}]) => void): Promise<[ClientResponse, {}]>;
+  sendMultiple(data: MailDataRequired, cb?: (error: Error | ResponseError, result: [ClientResponse, {}]) => void): Promise<[ClientResponse, {}]>;
 }
 
-declare const mail: MailService & { MailService: typeof MailService }
+declare const mail: MailService & { MailService: typeof MailService };
 export = mail