Surviving columnist Patrick Pelloux told AFP the magazine would bring out a "survivors' issue" next Wednesday to show that "stupidity will not win" after the attack on its headquarters which left 12 dead.
The newspaper's lawyer, Richard Malka, said the 60,000 copies Charlie Hebdo would normally print was being multiplied because of the massive attention worldwide brought by yesterday's bloody attack.
All agreed that "the next issue has to come out -- it's the best way to pay homage to the dead and to show that they (the attackers) did not kill us off," he said.
Pelloux admitted that "It's very hard. We are all suffering, with grief, with fear, but we will do it anyway because stupidity will not win".
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In November, the 44-year-old publication, which seeks to amuse and provoke readers over current events with irreverent cartoons, had launched an appeal for donations to stave off imminent bankruptcy.
But this week's issue sold out yesterday after the attack, with some copies on eBay attracting extraordinary bids of over 70,000 euros (USD 82,400).
Twelve people, including five cartoonists, were killed in yesterday's attack that also left two policemen dead.
The cartoon-reliant newspaper -- with a name inspired by the American comic book character Charlie Brown from the series "Peanuts" (with "Hebdo" being French slang for weekly) -- will present a special issue of eight pages instead of its usual 16, Malka said.
A French media fund managing 60 million euros (USD 70 million) donated by Google in 2013 will make an unspecified financial contribution to Charlie Hebdo. Government agencies have also taken subscriptions to the newspaper to lend it support.
The French government and dozens of media organisations have now vowed to ensure Charlie Hebdo continues.