The Kremlin raised the possibility of changing Russia’s constitution after a top lawmaker proposed bolstering parliament’s powers, in a move that could help to extend President Vladimir Putin’s rule.

The idea of constitutional amendments, including allowing parliament a say in forming the government, received “a widespread response” and are “a matter for discussion,” Putin’s spokesman, Dmitry Peskov, told reporters on a conference call Wednesday.

Putin in 2024 must step down as president to avoid violating a constitutional ban on more than two consecutive terms. While he’s previously ruled out changing the constitution to remain as president, advisers are examining ways to effectively prolong his grip on power, which is already the longest since Soviet dictator Josef Stalin.

The Kremlin is considering changing the electoral system in an effort to secure its lock on the lower house of parliament in 2021 elections amid a plunge in popularity of the ruling United Russia party, according to people familiar with the preparations. Keeping a strong hold on the legislature, known as the State Duma, would widen Putin’s room for maneuver.

It could potentially allow him to switch roles to retain power as head of the ruling party and prime minister with expanded constitutional authority at the expense of the presidency, according to two people close to the Kremlin and a ruling-party legislator.