Every club in the Premiership will be looking to make tweaks to their squad with Stephen Glass, Ange Postecoglou, Callum Davidson and Robbie Neilson amongst those who have been open with their desire to make additions.
The window is infamously difficult, especially for those, like St Johnstone, who are keen to do business early. Scottish clubs are aided, however, by the winter break which allows for time to bring in players and also assimilate them within the squad.
Yet, the rapid spread of the Omicron variant of Covid-19 could add an extra element of difficulty.
Looking at on-field action, there are three big Premiership matches on Wednesday with Shaun Maloney taking charge of his first match at Hibs when they host Aberdeen.
Scroll down and click through for all the latest news and transfer speculation from around the SPFL and Scottish football.
Yet, the rapid spread of the Omicron variant of Covid-19 could add an extra element of difficulty.