Private IP ICS not working

Hey All,

I have a website which is presenting a ICS file from an internally hosted mail server. Unfortunately, it looks like private IPs are blocked from working. I am only able to get it to work if I comment out the following in the class-r34ics.php file

if (!wp_http_validate_url($url)) { if ($this->debug) { $this->debug_messages[$url][‘Errors’][] = ‘Invalid ICS feed URL.’; } return false; }

Is there any way to put in an exception to specific internal IPs?