Microsoft has issued a firmware update for its Wireless Display Adapter. It's not clear right now what this update adds, but it bumps the firmware version to 1.3.8350. Just open up the Wireless Display Adapter settings in Windows, and select the Firmware section to find and download the update.
The Wireless Display Adapter was originally released in late 2014, and allows you to project your Miracast-enabled Windows device wirelessly to an external display. The company recently announced a second version of the adapter, which is slated to be released next month.