Use different picture on author pages

Hi all,
is it possible to not use the gravatar image as the author picture on the author page. I have added the Co-Author-Plus plugin and there I can manually upload a picture for the customized author box. But when I click on the authors name I will see a gravatar image and I just want to change it to the picture used for the author box. Here are links for your understanding.
Author box with the correct image at the bottom of: https://lumao.de/ostsee-probstei/
Incorrect image at the author page: https://lumao.de/author/caroline-schmidt-gross/

Thanks for your support,
Tim