Errors after Meteor upgrade

I've just performed meteor update which took me to v1.5. I'm getting a lot of TypeError: module.exportDefault is not a function errors. Currently it's at at meteorInstall.node_modules.meteor.react-meteor-data.ReactMeteorData.jsx (packages/react-meteor-data/ReactMeteorData.jsx:1:8) but it happens on several packages. I think it's do with dynamic imports but I can't get to the bottom of it. Pulling my hair out.