Size of bundle.js

[zawsx]

https://github.com/kantord/bottoml.in-e imports the just-dashboard module to show one way it can be used and outputs bundle.js
When I complile it, I'm actually getting bundle.js split into two parts as my webpack output, 625kb and 2548Kb. Looking back at the dashboard include, my dashboard.js is 3781kb and my vendors bundle 3335Kb
Is there a minimisation option I can take as I can't figure out why my bundle is 2171kb, more than double yours?