Partick chief executive Alan Dick has confirmed the club will appeal to the Scottish Football Association against the Scottish Premier League vote to allow Inverness Caledonian Thistle into the top flight.
The Firhill club, who finished bottom of the SPL last season, originally benefited from an SPL vote on promotion.
But, after Hearts and Hibernian requested a second vote, Bell’s First Division champions Inverness gained a 10-2 vote in their favour to share with Aberdeen.
Initially, Partick chairman Tom Hughes had claimed the club wanted to let the matter drop.
However, after meeting with the club’s legal team today, the Firhill board have “unanimously” decided to go ahead with an appeal to the SFA.
Dick said: “We are going to appeal. Our legal people have told us we should appeal to the SFA so we are going ahead.
“The appeal will, hopefully, be with the SFA within 48 hours and we are asking for the SFA appeal committee to get together to hear the appeal.”