Earlier this weekend, Microsoft announced it was continuing talks to buy TikTok from ByteDance, citing September 15 as the deadline for their completion. Trump’s executive order will go into effect shortly after the deadline set by Microsoft for the deal.

The White House also announced a similar ban on transactions with the Chinese company Tencent, which owns the WeChat messaging app. This messenger is widespread in China but has a much smaller presence than TikTok in the United States, where it is used mainly by members of the Chinese diaspora. The Tencent decree will also go into effect in 45 days.

The decrees came after the Trump administration said this week that it is stepping up efforts to remove “untrustworthy” Chinese apps from US digital networks, calling the short video sharing app TikTok and the WeChat messenger ” serious threats ” to national security.

The TikTok app can be used for disinformation campaigns that benefit China, and the United States ” must take aggressive action against TikTok owners to protect our national security, ” Trump pointed out in one executive order .

In another decree, he stated that WeChat ” automatically collects huge amounts of information from its users .” Such data collection could provide the Chinese authorities with access to personal and confidential information of Americans, the document says.