The following packages have been kept back: wikisuite-base wikisuite-external-repositories

root@:/home/debian# apt-get upgrade
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
Calculating upgrade... Done
The following packages have been kept back:
  wikisuite-base wikisuite-external-repositories
0 upgraded, 0 newly installed, 0 to remove and 2 not upgraded.
root@:/home/debian#