Oregon State Beavers football coach Gary Andersen has signed a one-year extension that will keep him under contract through the 2021 season, OSU officials announced on Tuesday.

Andersen just finished his second season with the Beavers, going 4-8 and guiding OSU to its first Civil War victory over the Oregon Ducks since 2007.

"We are excited about the direction of our program and the way our young men work to represent Beaver Nation the right way," Andersen said in a statement. "We expect to continue to be much improved off and on the field, and I look forward to successful seasons ahead. Go Beavs!"

Andersen signed a six-year contract when he became the Beavers' coach in December 2014, so Tuesday's extension adds one season to his deal. Terms of the extension were not disclosed, nor did the university say whether the terms of his original deal were changed. Andersen's original contract paid him a base salary of $2.45 million, with an annual raise of $100,000 after the first year. That gave him a salary of $2.95 million in the sixth and final year.

Here is more on Andersen's extension from the OSU release: