Green Party Leader Elizabeth May says she will run in the next federal election in a riding where she has a better chance of winning, with the party making a Commons seat its top priority.

In the 2008 general election, May battled Defence Minister Peter MacKay in Nova Scotia's Central Nova riding and lost to the high-profile cabinet minister by 5,600 votes.

Many political observers described her choice of a riding as self-defeating. MacKay has held Central Nova since 1997.

At the Greens' national convention in Toronto on Saturday, May said winning a seat in the House of Commons will be her party's top priority in the next election.

"The party has a fully prepared campaign plan. The party has made priority decisions around, for instance, that getting the leader elected is the top priority. It had not even been on a list of priorities that the leader getting elected had any particular importance, so this is a big change for us," she said.

In an online vote before the convention, members voted 74.3 per cent to eliminate the fixed term for leaders. In a separate online vote, 85 per cent voted in favour of a motion to support May's leadership.