Bruins general manager Peter Chiarelli made the announcement in a press release.
Lucic, a native of Vancouver, B.C., suited up in 81 games last year for Boston and scored 26 goals and a career high 35 assists.
The six-foot-four power forward was the team's top scorer two years ago with 30 goals and had 121 penalty minutes that season in helping to lead Boston to the Stanley Cup title.
He would have become a restricted free agent after the 2012-13 campaign, when his three-year, $12.25 million deal is set to expire.
Earlier this week, the team re-signed forward Tyler Seguin to a new six-year, $34.5 million contract and inked Brad Marchand last week to a four-year, $18 million deal.