Upgrading apache?

[koko92_national]

Code:

root@host:/etc# apt-get upgrade
Reading package lists... Done
Building dependency tree      
Reading state information... Done
The following packages will be upgraded:
  apache2 apache2-mpm-worker apache2-suexec apache2-utils apache2.2-common libkrb53 libpng12-0
7 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Need to get 1945kB of archives.
After this operation, 41.0kB disk space will be freed.
Do you want to continue [Y/n]? n
Abort.
root@host:/etc#

Will it be Ok if I upgrade? Would the upgrade change the config files and etc?