I don't think so, I think the shareholder's need to vote on the increase.
I did some research and found this definition that might be helpful:
Authorized Shares – These shares represent the total number of shares of stock authorized when the company was created. Only a vote by the shareholders can increase this number of shares. However, just because a company authorized a certain number of shares doesn’t mean it must issue all of them to the public. Most companies retain shares for use later called unissued stock or shares.