The decision is the first of two to make changes to the constitution, and between the two decisions, an intermediate election is required.
A spontaneous applause broke out among the members when the proposal was voted on.
In brief, the parliament now says yes to a number of changes in both the Instrument of Government and the Riksdag Act, which will strengthen the independence of the courts and make it more difficult to change the constitution in the future.
The background, according to the government, is that Sweden is in the most serious security policy situation since the Second World War. At the same time, developments in other countries show that political forces can undermine the rule of law and democracy in a short time.
With Wednesday's decision, a first step is taken to require that at least half of the Riksdag's members must say yes to adopt a constitutional proposal as pending, and at the second decision, it will be required that at least two-thirds of the members say yes. Today, no requirement for a qualified majority is made at decision number two.
At the same time, it will be established in the constitution that the number of justices in the Supreme Court and the Supreme Administrative Court shall be at least 12 and at most 20. New justices will also only be able to be appointed after a request from the court.
The legislative changes are proposed to come into effect on 1 April 2027.
