The following versions are required for proper operation:
| Package | Minimum Version | Tested with |
| MySQL | 4.1.x | |
| PostgreSQL (experimental) | 7.0 | 8.0 |
| PHP | 5.2.x | |
| Web Server | Apache 1.3, Apache 2.0.54, IIS 6.0 |
MantisBT is designed in a way to work in as many environments as possible. Hence the required extensions are minimal and many of them are optional affecting only one feature. The following PHP extensions are the ones used:
mysqli (or the extension for the DBMS being used) - mandatory.
Curl - if the Twitter integration feature is required.
GD - if the graphs feature is required.