Opposition leader Lee Jae-myung was sworn in as South Korea’s next president on Wednesday following a dramatic snap election six months after the country’s previous leader declared martial law and plunged the nation into chaos.

Both Lee and conservative Kim pledged change for a country deeply scarred by a shock martial law briefly imposed by former leader Yoon Suk Yeol.

After a tighter-than-expected presidential election, Lee Jae-myung aims to restore stability to a nation wracked by months of political upheaval. But issues of trust remain.