The present invention relates to nanoparticles for use as a medicament, said nanoparticles comprising 1-(4-{[4-(dimethylamino)piperidin-1-yl]carbonyl}phenyl)-3-[4-(4,6-dimorpholin-4-yl-1,3,5-triazin-2-yl)phenyl]urea, or pharmaceutically acceptable salt thereof, a substantially hydrophobic acid and a polymer.