* Fixed dill's version to `0.3.4` (include major business logic changes in dill `0.3.5` or later, which will cause error 1, so `0.3.4` is the last usable version based on original code)
* Last version supporting python3.6, which will be deprecated in next version.
**Full Changelog**: https://github.com/potc-dev/potc/compare/v0.0.3...v0.0.4