The Cottagers overcame Queens Park Rangers on Monday night to maintain their place in 10th spot in the table to move them nine points clear of the drop zone.
Jol is keen to build on their recent good run of form and end the season well by securing a top-half finish.
"Everyone tells me that in England 39/40 points will do and I have worked here for five or six seasons and in one or two seasons 37/38 poins was enough and we have got 39 points now and hopefully we will be fine, but in this league you never know," Jol told Sky Sports News.
"We have got 39 points now so hopefully we can look up now and get as high as possible."
Jol admits he feared Fulham might struggle this season after losing a number of key performers in the summer and feels being clear of relegation at this stage of the campaign is a major achievement for the club.
"We lost [Clint] Dempsey, [Mousa] Dembele, Danny Murphy and I thought it could be a difficult season for us but in the first week in April to be on 39 points I think is fantastic," added Jol.