Pixellated gravatar

Hey there.

When I’m trying to use the gravatar with this code <?php echo get_avatar( $post->post_author, $size = '96' ); ?>, it displays all pixellated like this https://cl.ly/V7uf.

When I try to edit the size from 96 to 150, nothing changes. And if I try to manipulate the size through the CSS, the pixillation just gets worse. Actually, even the $size = ’96’ does’nt work – it default to approximately 70x70px.

Any ideas what it might be? Thanks for your time ??

– August