ABERDEEN boss Derek McInnes has tied another of his Pittodrie prospects to a longer contract after defender Scott McKenna penned a new deal.

The 20-year-old’s new agreement will keep him at the club until the summer of 2021.

The Scotland Under-21 ace has started the Dons’ last three games and formed a promising partnership Kari Arnason.

Now he is looking forward to continuing his first-team education alongside the Icelandic international.

He told the official Aberdeen website: “Kari has been a great help to me with all the experience he has and it’s made the transition to first-team football a lot easier. I tend to take each game as it comes and not set targets, but obviously I want to keep my place first.”

McInnes added, “Scott was always one who we wanted to work with and he’s done exceptionally well over the last few games.”