Arsenal’s director of women’s football Clare Wheatley said Slegers has “proven to be an elite coach”.
The length of her new deal will give the club stability as they seek to recruit for the long term with Slegers at the centre of the decision-making.
Arsenal want to lower the average age of the squad and believe Slegers’ coaching ability can help develop players over time.
She has faced criticism this season, particularly after a poor start, but having delivered the Champions League trophy in May, her stock is high within the club.
While it has not gone to plan so far this season, discussions over a new long-term deal for Slegers took place in the summer, and recent frustrations have not had an impact on that.
The club view Slegers as an emotionally intelligent person, capable of managing a squad with high-profile players and vast experience.
It will be a crucial few months – not just in terms of navigating the January transfer window, but for Slegers to demonstrate a consistent and clearer playing style, and silence rumblings of doubt among the fans.
She has proven her credentials before but expectations are higher now and responsibilities are greater. She will be backed and must deliver further success.