insecure image ‘/wp-content/themes/adventurous-pro/images/social-profile.png’

Dear Suport Team, When I check our https site via console I get this https:// <-> http:// complaint: Mixed Content: The page at 'https://www.stiftung-meeresschutz.org/' was loaded over HTTPS, but requested an insecure image 'http://www.stiftung-meeresschutz.org/wp-content/themes/adventurous-pro/images/social-profile.png'. This content should also be served over HTTPS. Is there a way to load social-profile.png with a https:// link? Thanks for looking into this All the best Ulrich