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(CNN) -- Venezuela's top election official said Thursday that authorities will complete a 100% audit of votes cast in Sunday's presidential election.

Tibisay Lucena, president of Venezuela's National Electoral Council, said officials decided on the audit after a lengthy debate.

Officials had already audited 54% of ballot boxes, and now will audit the remaining 46%, she said.

READ MORE: Why Venezuela is so divided

The decision comes after opposition candidate Henrique Capriles Radonski filed complaints with election officials about thousands of alleged violations during Sunday's vote.

"The electoral power is making this decision in order to preserve a climate of harmony between Venezuelans, but also to isolate violent sectors that are irresponsibly trying to harm democracy," Lucena said.

Capriles said he accepted the council's decision Thursday because he believes that the problems his campaign spotted would be detected in the audit of the remaining 46%.

"I want to congratulate our people, because this was your fight," Capriles said late Thursday.

Earlier this week, Lucena certified the election results and declared Nicolas Maduro president-elect, despite Capriles' calls for a vote-by-vote recount.

Maduro secured 50.8% of votes in Sunday's election, while Capriles won 49%, election officials said earlier this week.

Maduro is scheduled to be sworn in at a ceremony in Caracas on Friday. It was unclear late Thursday whether the audit would impact plans for his inauguration.

The audit will take about 30 days and will involve comparing results from voting machines with printed reports and registries containing voters' signatures, Venezuelan constitutional lawyer Jose Vicente Haro told CNN en Espanol.

1. Who is Tibsay Lucena?
1. president of Venezuela's National Electoral Council