Captcha recaptcha is not working on joomla?

Captcha recaptcha is not working on joomla? 

It was perfectly working yestarday but today the captcha does not appear anymore.

PATH of recaptcha is now changed

From: 
http://api.recaptcha.net/js/recaptcha_ajax.js
To: 
http://www.google.com/recaptcha/api/js/recaptcha_ajax.js


You can fix this issue by changing the installed recaptcha plugin.

plugins\captcha\recaptcha\recaptcha.php

From:

      const RECAPTCHA_API_SERVER = "http://api.recaptcha.net";  
      const RECAPTCHA_API_SECURE_SERVER = "https://www.google.com/recaptcha/api";  
      const RECAPTCHA_VERIFY_SERVER = "api-verify.recaptcha.net";  

To:

 const RECAPTCHA_API_SERVER = "http://www.google.com/recaptcha/api";  
 const RECAPTCHA_API_SECURE_SERVER = "https://www.google.com/recaptcha/api";  
 const RECAPTCHA_VERIFY_SERVER = "api-verify.recaptcha.net";  

Still not working please contact me