How can I change the image on the facebook link

I changed the image on my form, but the facebook link is not being updated to the new image, how do I fix this? My email address is lottcm@homesc.com.

Please try it again, I have now fixed the issue using https://developers.facebook.com/tools/debug/sharing/.

If the issue persists, let us know so we can investigate it further. Thank you.