The social media app TikTok is now prohibited on U.S. House members and staff mobile devices by the Committee on House Administration's Office of CyberSecurity.

"The Office of Cybersecurity has been deemed the TikTok mobile application to be a high risk to users due to a number of security risks," the Office of the Chief Administrative Officer (CAO) said in a notice. "House staff are NOT allowed to download the TikTok app on any House mobile devices. Tik Tok is NOT allowed on House mobile devices. If you have the TikTok app on your House mobile device, you will be contacted to remove it."

The notice also "requires executive brand agencies to begin removing" the app from their devices as well.

CAO issued an advisory earlier this year that said they "do not recommend the download or use of [TikTok]" due to "security and privacy concerns."

"TikTok is a Chinese-owned company, and any use of this platform should be done with that in mind," CAO said in its previous advisory. "The 'TikTok' mobile application has been deemed by the CAO Office of CyberSecurity to be a high-risk to users due to its lack of transparency in how it protects customer data, its requirement of excessive permissions, and the potential security risks involved with its use."