Bleeding sound between floors

[Sydney McCloud]

Tenant has notified me that the noise coming from the floors above is loud. I know that is probably just a normal and natural part of apartment living, but there is very squeaky floorboards right above the tenants bedroom, causing her sleep to be interrupted very early in the morning when my tenants has to wake up for work. particularly bad areas. Any solution for minor sound proofing fixes that may be able to work? This has been happening for a couple of months now.