The White House is giving all federal agencies 30 days to wipe TikTok off all government devices, as the Chinese–owned social media app comes under increasing scrutiny in Washington over security concerns.

The Office of Management and Budget calls the guidance, issued Monday, a “critical step forward in addressing the risks presented by the app to sensitive government data.” Some agencies, including the Departments of Defense, Homeland Security and State, already have restrictions in place; the guidance calls on the rest of the federal government to follow suit within 30 days.

The White House already does not allow TikTok on its devices.

“The Biden–Harris Administration has invested heavily in defending our nation’s digital infrastructure and curbing foreign adversaries’ access to Americans’ data,” said Chris DeRusha, the federal chief information security officer. “This guidance is part of the Administration’s ongoing commitment to securing our digital infrastructure and protecting the American people’s security and privacy.”

The guidance was first reported by Reuters.

Congress passed the “No TikTok on Government Devices Act” in December as part of a sweeping government funding package. The legislation does allow for TikTok use in certain cases, including for national security, law enforcement and research purposes.