Blizzard has accidentally revealed the official release date of StarCraft II‘s upcoming Heart of the Swarm expansion over on Battle.net.

A release date of March 12, 2013 was posted on the official StarCraft II Battle.net page before quickly being taken down. A Digital Deluxe Edition of the expansion will be available to buy which includes three StarCraft II Battle.net portraits, a StarCraft II Zerg Ultralisk “Torrasque” skin, a World of Warcraft Baneling pet, and a Blade Wings item and Zerg banner sigil for Diablo III.

Blizzard is expected to officially announce the release date later today.