The Portal da Lingua Portuguesa is a website containing information about the Portuguese language oriented towards the general public. The largest part of the information on the Portal is lexical information concerning formal characteristics of words, such as orthography, derivations, loanwords and gentiles. The lexical information comes from a lexical database called MorDebe-or more precisely, a network of lexical databases called the Open Source Lexical Information Network (OSLIN). This abstract shows the general set-up of and major functions of MorDebe Admin, which is the lexicon management system for OSLIN. MorDebe Admin provides an easy and secure way of updating and editing the content of the different databases of OSLIN. Furthermore, much of the data on the Portal are organised as mini-dictionaries and MorDebe Admin provides an integrated collection of tools dedicated to the maintenance of these mini-dictionaries, as well as a built-in neologism tracking system. The software demonstration will illustrate these functions from a user perspective, and how easy ir is to maintain the data behind the Portal.