Unable to bundle js file version mismatch

[developerdex2908]

When building the bundle, it always complains react native version mismatch. Version 62.2 and version 61.4 mismatch.

I've tried to downgrade the version to 61.4, but some of the js files will not be available in folders such as react-native/Libraries and react-native/Components. I assume this is because expo is only supporting version 61 so far?

How can i fix this? please help.