London, November 13 Matt Damon has revealed that fans have to wait for some more time for the next installment of the 'Bourne' film series, as the script is still not ready.

The actor insisted that he and director Paul Greengrass are currently working on an original script, for the franchise based on the books by Robert Ludlum.

"Personally, selfishly, we'd all really like to do it, but we are really serious about trying to get the story and the script right," the Daily Star quoted him as telling Britain's Total Film magazine.

He added: "Because the only thing more disappointing than not having another one of these movies is - for us and for movie fans - to make one that isn't good.

"Everyone would say, 'They should have quit after three.' And we'd feel that way too. We don't have the script yet, but hopefully we'll all be shooting in 18 months or so."(ANI)