Category list break at 10

Hi great people, nice theme.
I have a minor problem, i want to list all posts from certain category on a page, to be precise there is 12 posts, but it shows only 10, and the rest just put in the next page ( bellow posts makes to choose [1] and [2] part of the page).
How can I put all posts from category in one page, without breaking in two?
Thanks!