keep up (with sb/sth)
phrasal verb with keep verb uk/kiːp/ uskept | kept
to do something or move at an acceptable rate, or at the same rate as someone or something else:
It's a fast pace, and you'll have to work hard to keep up.
They pioneered the product, but now they have to keep up with the competition as regards innovation and price.
It was difficult to keep up with all the orders that were coming in.