Celtic have set their asking price for Kris Ajer.
TV2 reports Celtic have turned down a £15m offer from Brentford for Ajer - with the Bhoys' £20m valuation deterring potential suitors.
The Canaries got nowhere with an initial £10m offer, plus add ons, last month for the Norwegian international, who was also heavily linked with Bayer Leverkusen and Newcastle United.
Celtic value the 23-year-old, who is now in the final year of his current Parkhead deal, at £20m.
New Hoops boss Ange Postecoglou is fighting to keep hold of the centre-half.
