Want to use HTTPS while loading this plugin on my blog

@sunwu2007

I added the Facebook Like Box widget to my wordpress.com blog (www.thestateofedtech.com) and I have set it up as below (copied from iframe src):

http://www.facebook.com/plugins/likebox.php?href=https%3A%2F%2Fwww.facebook.com%2FTheStateOfEdTech&width=400&height=580&colorscheme=light&show_faces=true&stream=true&header=false&force_wall=true

As you can see the iframe is loading a http link. I want to change this to a https link?

Thanks
Varadu

http://wordpress.org/extend/plugins/facebook-like-box-widget/