Mark Warburton is hoping to secure the long-term futures of three of his key players from this season.
Mark Warburton's side currently top the Scottish Championship table by three points, and appear well on course to book their return to the Premiership.
And the trio have been invaluable to the side this season, with Holt's absence in the victory over Dumbarton in September being the only time during the entire league campaign when any one of the three have missed a game.
The former Hearts man has been in scintillating form for much of the season, with his eight goals in 18 games making him the team's second highest goalscorer. Meanwhile, Halliday and McKay have also been impressive with three goals apiece for the table-toppers.
And while none of the named players' contracts expire in the very near future - with Halliday's and McKay's deals expiring in 2017, and Holt's expiring one year later (via Daily Record) - the desire to get them tied down for longer highlights how crucial Warburton clearly feels they will be as the club attempt to continue their ascent back to the summit of the Scottish game.