Amazon’s Project Kuiper is an ambitious project and could eventually be a serious competitor to SpaceX’s Starlink satellite internet service. But that’s only if Amazon can start building its satellites a little faster.

According to Bloomberg, Project Kuiper has run into production delays. It’s on a government deadline to have about 1,600 satellites in orbit by next summer, but so far it’s only managed to churn out a few dozen of the spacecraft. The company will need to quadruple its production capacity if it still plans to meet that deadline.