Increase in wage, new LCA required?

I got selected in the H1B lottery for 2016. I have still yet to go for my visa stamping. My LCA was filed for $100,000 during January 2016. Now I have got an additional 12 months of experience so wanted the company to increase my salary.

My question is can the company increase my wage before the visa stamping with the current LCA form. i.e. is it possible to ask the company for a new offer letter with better salary with the current LCA form or the company needs to file a new LCA form with the current wage?