Apple has released a new update for its AirPort software, version 4.0.1, which it recommends be installed by all AirPort Express users.

The company has released two separate updates, one for Mac, another for Windows systems.

Brief notes accompanying the release say it adds improvements to 'Profiles' support in the AirPort Admin Utility, and also improves handling of Wired Equivalent Protocol (WEP) keys with third-party access points.

The 1MB software is available through Software Update (Mac systems) and also for direct download from Apple's Web site (Mac and Windows systems).