NATO has officially banned staffers from downloading the social media app TikTok onto their NATO-provided devices, citing security concerns, according to two NATO officials familiar with the matter.

Axar.az reports referring to CNN that NATO officials sent a note to staff on Friday morning announcing the ban, the officials said. The note made the ban official, but TikTok was not really usable on NATO-issued devices before, anyway, the officials said, because of internal tech restrictions.

“Cyber security is a top priority for NATO. NATO has robust requirements for determining applications for official business use. TikTok is not accessible on NATO devices,” a senior NATO official told CNN.

NATO is the latest governmental body to ban the app over concerns that the Chinese government could have access to TikTok users’ data through its Chinese parent company, Bytedance. The US, UK, Norway, European Parliament and other nations have already banned the app from government-issued devices.