Reply To: Captcha SSL image

i changed the admin_url link in /lib/functions/both.php, also replaced the file “easy_Reservations_form_shortcode.php” on line 491 src image with a full https:// tmp dir, and now the captcha image is loading correctly. but still browsers is showing an insecure website msg. how can i make the plugin to work on a secured link..(ajax,java,css,images)