The Swans have surprised everyone this season, by winning the Capital One Cup as well as challenging for a position high up the Premier League table.
The Welsh outfit have already secured Europa League football for next term, and Williams concedes that he is not sure what his side's main aims are for the remainder of the campaign.
"We've had a good season so far and we want to make sure that is still the case when it ends," said Williams.
"We have a hard run of games coming up that are going to test us and if we can get through that, get some more points, get some more wins, who knows?
"We haven't set a target about where we want to finish but we want to push on."
Swansea travel to West Bromwich Albion on Saturday.