Hummingbird Poor Score because Remove render blocking resources

Hummingbird gave me only 18/100 for Remove render blocking resources. This is what it’s suggesting:

None of the above-the-fold content on your page could be rendered without waiting for the following resources to load. Try to defer or asynchronously load blocking resources, or inline the critical portions of those resources directly in the HTML.

Remove render-blocking JavaScript:

Optimize CSS Delivery of the following:

All those are coming from Hummingbird CDN.

How can I increase the score? I’ve moved assets to footer as far as possible without breaking the site.