How to upgrade third party app from python 2.x to python 3.7 that was made by Splunk Add On Builder?

Hi, Any ideas how to upgrade Splunk third party app from python 2.x to pyhon 3.7 that was made with Splunk Add On Builder. The main changes in the app itself are in the Splunk libraries generated by the builder itself like jinjs2, solnlib, mako... Can I use 2to3 package and just transform all python 2 code to pyhon 3 code and not brake any dependencies? Any suggestion will be helpful?