Sky has taken steps to stop people watching pirated content on its Now TV Box. It's disabled the developer mode which let people side-load apps that could be used to stream illegal content.
In a blog post, Sky said it was just one of a few changes on the way.
"In the coming days, there will be a few changes to the Now TV Box as part of our regular updates to improve the service," wrote Karl-F, a community manager for Now TV.
"The latest update has been designed to safeguard the device from piracy and illegal streaming of content; therefore it will disable the use of unofficial third-party software or apps.
"This will not affect your ability to watch Now TV or download supported apps through the Channel Store."
Sky's Now TV Box is essentially a rebadged Roku streaming box, designed to promote its Now TV streaming service. Those wanting to side-load app like Plex Media Centre can still do so on a standard Roku box.
Streaming illegally is big news at the moment. The government's Digital Economy Bill has come under scrutiny by a rights group, while the Premier League recently won a major court order in its battle against Kodi boxes, which enable illegal streaming.