Arsenal manager Arsene Wenger says his team is "active" to add quality to his squad.
The Gunners have signed two players so far this summer with winger Thomas Lemar still heavily linked with a possible move to the Emirates.
But the 67-year-old also said that bringing top-level players to Arsenal is not easy because of the huge amount of money being paid by the other clubs.
"What’s next is to remain active," he told Arsenal Player.
"Not a lot [has] happened.
"I believe there are actually two ways to improve the team. First of all to improve the quality of what we do in training to improve the squad and improve the players we have, and secondly to bring more top-level players in.
"The difficulty is to bring top-level players in because you pay a huge amount of money for very normal players at the moment. As well, all the big clubs are chasing the same players and that provokes huge inflation.
"Maybe this will be the first time we [football clubs] pay over £200m, maybe over £300m with Neymar and around £200m with Mbappe.
"So there is a huge inflation. But we are active, we are working hard and I think we have done well with Kolasinac, we have done well with Lacazette and we are continuing to work."