The Covid-19 pandemic in Brazil challenged the government with the adoption of measures to face the disease. One can say that President Bolsonaro is characterized by his negationist standing over the sanitary actions recommended by health authorities. This behavior led many people to criticize Bolsonaro in the media. Some reactions presented by state organs against the critics, mainly the police, was the enactment of criminal investigations based on the National Security Law (NSL), a statute approved while Brazil was under a dictatorship (1983). That situation forced a movement to replace the NSL. This paper aims to analyse how the bills presented in the Congress with this objective can improve the mechanisms to defend the Brazilian institutions without harm the fundamental rights enshrined by the 1988 Constitution. The investigation’s relevance arises from the need to replace one more authoritarian remnant in Brazilian legislation with a statute capable of strengthening democracy.