Mixed Content after change http to https my site

Hello, i recently add SSL certicate to my site, so now i have https://silvanaskitchen.com.
Im use this plugin to post recipes, and i love it! But i have an issue:
when i open a recipe i receive on my inspector console a MIXED MEDA WARNING (this dont let the page get GREEN PADLOCK that get on the another pages, like home or shop) my console said the link with HTTP issue is: http://yummly-static.s3.amazonaws.com/pixels/wordpress-plugin.png?url=https%3A%2F%2Fsilvanaskitchen.com%2Fgluten-free-crispy-fried-chicken%2F (this change for each recipe) So can i fix this?

https://ww.wp.xz.cn/plugins/yummly-rich-recipes/