Lockheed Martin Aeronautics will upgrade Singapore’s F-16 fighter aircraft under a $914 million United States Air Force contract, the U.S. Department of Defense (DoD) announced in its Tuesday publication of military contracts.

Information wasn’t provided as to how many of the aircraft will receive upgrades, but it is known that the work will be conducted in Fort Worth, Texas, and should be finished by June 30, 2023. The fixed-price incentive and cost-plus contract was awarded as a result of a sole-source acquisition.

The DoD also announced that Lockheed Martin Mission Systems and Training will be given $49.1 million under a Navy contract option for the ship integration and test of the Aegis Weapon System (AWS) for AWS Baselines through Advanced Capability Build (ACB) 12. Some of the work Lockheed will conduct includes Aegis shipboard integration engineering, ballistic missile defense test team support, and AWS element assessments. The contract involves the testing, integration, and modernization of select DDG 51 destroyer ships. All ships currently possessing AWS baselines up to the ACB 12 will receive integrated combat system modification and upgrades under the contract.

More than $4 million of the funding being assigned with the award will expire at the end of the 2015 fiscal year. The labor will be conducted at various locations throughout the U.S. and should be finished by November 2018.