"just require" is correct and usable in written English.
You can use it when you need to express that a particular action is necessary. For example, "The job just requires a few hours of your time each week."
Short shapes just require occasional stirring.
It'll just require higher taxes on every American".
But self-described "constitutional conservatives" should remember that Mr. Madison's ingenious system doesn't just require compromise.
"Franchises really just require the right leaders to implement strategy and lead.
Your bank may just require you fill in a consent form and pay a small fee.
Or do Canadians just require more personal space than the rest of us?
To become prime minister next May, however, the Labour leader doesn't just require the populist touch.
That would just require them to look in a mirror to find the solution.
There's nothing complex or revolutionary about these structures; they just require more consideration than the conventional full rhythm section accompaniment.
Not every baby who cries is in a crisis, it may just require some nurturing before the wails pass.
All these interacting pieces just require a tighter set of communication than we've ever had to do before".
