The country is already on high alert after terror attacks in March claimed by the Islamic State group on Brussels airport and on the city's metro system left 32 people dead.
"We are determined to show that democracy is stronger than the terrorists," Michel told a news briefing in Brussels.
"We of course intend to take extra measures for events linked to the national holiday (on July 21)," Michel said.
'Reviewing our own safety' after Nice attack, says London mayor
Michel said that despite the Nice attacks Belgium was keeping its terror alert level at the second-highest level of three, which means a threat is possible and likely.
Belgian authorities had previously anticipated a possible truck-style attack before the Nice carnage, in which at least 84 revellers were killed, Michel added.
"Without revealing our plans, we were already wary to the idea of this type of scenario," Michel said.
At least 84 killed in France as truck plows into crowd
Several of those involved in the Brussels bloodshed were directly linked to the November attacks in Paris which left 130 dead.
Belgian authorities last month charged two men with terrorist offences amid reports of a planned attack on a Euro 2016 fanzone in central Brussels.
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