Ukraine is preparing to debate changes to the constitution spurred by recent unrest that would weaken the powers of the president, Radio Liberty reports.
Opposition leader Arseniy Yatsenyuk, who a week ago rejected Yanukovych's offer to give him the prime minister's post, has urged lawmakers to back the changes.
"The only way to stabilize the situation is the restoration of the constitutional rule of law and return to the Constitution of 2004. Dictatorial powers of the acting president must be canceled," Yatsenyuk said.
Yanukovych has already accepted the resignation of the government, while parliament has repealed controversial antiprotest laws and approved a conditional amnesty for detained protesters. But the opposition wants Yanukovych's resignation and an early presidential election.
The country has been gripped by more than two months of protests, with opponents demanding that President Viktor Yanukovych resign.