Vegas-viz graphs not showing up when Jupyter notebook uploaded onto github

[karanalang]

Hello - i'm using Jupyter scala notebook (Kernel - Apache Toree) and using Vegas-viz for creating graphs. This works fine, and i'm able to see the graphs on Jupyter notebook.
I downloaded the Jupyter notebook as .ipynb files, and am uploading it to github. - idea is to share this with business users.
However, the uploaded notebook does not show the Graphs created by Vegas, though it does show the text (queries, results etc).

Any ideas on what needs to be done to fix this ?