Ukraine is expected to have to repay military aid provided by the US.
The US has demanded $500 billion in funds linked to Ukraine's natural resources, but Ukrainian officials say the real amount is around $90 billion.
So far, no final agreement has been reached and the Ukrainian president is still not ready to approve the deal.
President Donald Trump has urged Ukraine to accept the deal, warning that Kyiv could be left out of future peace talks.
The US has proposed using money from Ukraine's minerals and other resources to help rebuild the country.
However, some argue that the deal would give the US too much control.
Previously, the US wanted half of Ukraine's income from natural resources, but Zelenskiy rejected the idea.
Trump has also said he might make a deal with Russia without involving Ukraine.
Currently, Ukraine wants more security guarantees for Ukraine before agreeing to any terms and conditions.
