Update README.md

Author: MailboxValidator

README.md

@@ -1,5 +1,5 @@
-[![npm](https://img.shields.io/npm/v/mailboxvalidator-nodejs)]((http://npm.im/mailboxvalidator-nodejs))
-[![npm](https://img.shields.io/npm/dm/mailboxvalidator-nodejs)]((http://npm.im/mailboxvalidator-nodejs))
+[![npm](https://img.shields.io/npm/v/mailboxvalidator-nodejs.svg?style=flat-square)]((http://npm.im/mailboxvalidator-nodejs))
+[![npm](https://img.shields.io/npm/dm/mailboxvalidator-nodejs.svg?style=flat-square)]((http://npm.im/mailboxvalidator-nodejs))
 
 MailboxValidator Node.js Module
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