Is there a need for moral enhancement?

In several contributions, Persson and Savulescu have argued that there is an urgent need for moral enhancement. I suggest that their original argument, based on the connection between cognitive enhancement and moral enhancement, is inconclusive. I further take up a sceptical stance with respect to the more moderate view, defended by Douglas, according to which moral enhancement, though not a moral necessity, is inherently beneficial and worth pursuing. If moral enhancement interferes with the construction of our moral character, and risks endangering the integrity of the moral self, I suggest there may be reasons to doubt that it is morally permissible.