The 2017 National Population Projections were revised after their original release date to correct an error in infant mortality rates. The files were removed from the website on August 1, 2018 and an erratum note posted. The error incorrectly calculated infant mortality rates, which erroneously caused an increase in the number of deaths projected in the total population. Correcting the error in infant mortality results in a decrease in the number of deaths and a slight increase in the total projected population in the revised series. The error did not affect the other two components of population change in the projections series (fertility and migration). Major demographic trends, such as an aging population and an increase in racial and ethnic diversity, remain unchanged.