sIFR line-height

Hi I am using sifr3-r436 and cannot seem to set the line-height.
Ive tried using a basic css rule in the sifr-config.js file.

sIFR.replace(DIN, {
selector: ‘h2’,
css: ‘.sIFR-root { color: #004b91; text-transform:uppercase; line-height:20px }’
});

It appears to totally ignore the line-height though?