Only numbers in captcha

Hello Team,
How to use only numbers in Captcha?.
This topic :http://www.chronoengine.com/component/chronoforums/posts/t15746/p39827.html tells about it but how to get this done in Chronoform v5?

Thanks
Abhijit

Hi Ahbijit,

Please make the same change but this time in /libraries/cegcore/helpers/captcha/captcha.php around line 35.

Make a note of the change as you will need to make it again after installing a new release of ChronoForms v5

Bob

Thanks Bob. Its working for me.
I will make a note of this change.

-Abhijit