Hey Fabien! It doesn't look like the link for this article is on your main page. I love your posts and check the main page frequently each week; I totally missed it until I saw it here.
The http response headers from your server tells the browser to cache the page for 3 days. Either reduce this 3 days value or add ‘nocache’ in the Cache-Control header to tell the browser to validate the cache with a request every time the page is loaded.