TotalEnergies has lifted force majeure on its $20 billion Mozambique liquefied natural gas (LNG) project, four years after Islamist militant attacks forced work to stop.

The notice was sent to the Mozambican government last week, the company confirmed. However, construction will only resume once an updated budget and development plan are approved by the Mozambican government.

TotalEnergies expects the 13-million-metric-tonne-per-year project to start production in 2029, about five years later than first planned. Costs have risen by at least $4 billion due to security expenses and the prolonged suspension. Nearly 90% of the project’s future output has already been sold under long-term contracts to buyers including Shell; the China National Offshore Oil Corporation, a Chinese state-owned company; and another state-owned-company, France’s EDF.

The project is about 40% complete.