Putin announced the package of reforms in January, then repeatedly denied they were meant to extend his grip on power as he approaches the end of his fourth and final presidential term in 2024.
However, on Tuesday another amendment was introduced that would reset presidential terms, making it possible for Putin to run again if the constitutional court allows it.
The changes "are not just justified... they plan... for the strategy of the development of the country," Duma speaker Vyacheslav Volodin said after Wednesday's vote, Russian agencies reported.
Other additions to the constitution include guarantees for pension payouts and minimum salaries, and giving parliament additional power to nominate the head of government.
They also give the president additional powers to fire judges in the country's higher courts and to reject laws passed by parliament.
Business Standard has always strived hard to provide up-to-date information and commentary on developments that are of interest to you and have wider political and economic implications for the country and the world. Your encouragement and constant feedback on how to improve our offering have only made our resolve and commitment to these ideals stronger. Even during these difficult times arising out of Covid-19, we continue to remain committed to keeping you informed and updated with credible news, authoritative views and incisive commentary on topical issues of relevance.
We, however, have a request.
As we battle the economic impact of the pandemic, we need your support even more, so that we can continue to offer you more quality content. Our subscription model has seen an encouraging response from many of you, who have subscribed to our online content. More subscription to our online content can only help us achieve the goals of offering you even better and more relevant content. We believe in free, fair and credible journalism. Your support through more subscriptions can help us practise the journalism to which we are committed.
Support quality journalism and subscribe to Business Standard.