Aging refers to the evolution of system properties with waiting time tw. It is a key feature of glassy dynamics. Recent experiments have demonstrated aging in biological systems that are inherently active with a magnitude of self-propulsion force f0 and a persistence time τp. Thus, what governs the aging dynamics in these active systems has fundamental importance. We formulate a generic mode-coupling theory (MCT) of active glasses to address this question in the regime when activity is not too large. The aging solutions of the theory show that the two-point correlation function decays more slowly with growing tw, and the relaxation time tr increases. The activity-modification of the MCT critical point, λc, has profound significance for active aging: the quench distance from λc governs aging and determines δ, where tr ∼ tδw. δ decreases with increasing f0, in agreement with existing simulations. However, the variation with τp depends on the nature of activity. [1]