TypeError: can't subtract offset-naive and offset-aware datetimes

[Zapata]

Script fails with the below error whatever configuration is used:

Traceback (most recent call last):
  File "cli.py", line 5, in <module>
    cli.main()
  File "/home/zapata/.local/lib/python3.5/site-packages/click/core.py", line 722, in __call__
    return self.main(*args, **kwargs)
  File "/home/zapata/.local/lib/python3.5/site-packages/click/core.py", line 697, in main
    rv = self.invoke(ctx)
  File "/home/zapata/.local/lib/python3.5/site-packages/click/core.py", line 1066, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "/home/zapata/.local/lib/python3.5/site-packages/click/core.py", line 895, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/home/zapata/.local/lib/python3.5/site-packages/click/core.py", line 535, in invoke
    return callback(*args, **kwargs)
  File "/home/zapata/.local/lib/python3.5/site-packages/click/decorators.py", line 17, in new_func
    return f(get_current_context(), *args, **kwargs)
  File "/home/zapata/.local/lib/python3.5/site-packages/click/decorators.py", line 17, in new_func
    return f(get_current_context(), *args, **kwargs)
  File "/mnt/d/Projects/bitshares/bitshares-pricefeed/bitshares_pricefeed/ui.py", line 20, in new_func
    return ctx.invoke(f, *args, **kwargs)
  File "/home/zapata/.local/lib/python3.5/site-packages/click/core.py", line 535, in invoke
    return callback(*args, **kwargs)
  File "/home/zapata/.local/lib/python3.5/site-packages/click/decorators.py", line 17, in new_func
    return f(get_current_context(), *args, **kwargs)
  File "/home/zapata/.local/lib/python3.5/site-packages/click/decorators.py", line 17, in new_func
    return f(get_current_context(), *args, **kwargs)
  File "/home/zapata/.local/lib/python3.5/site-packages/uptick/decorators.py", line 50, in new_func
    return ctx.invoke(f, *args, **kwargs)
  File "/home/zapata/.local/lib/python3.5/site-packages/click/core.py", line 535, in invoke
    return callback(*args, **kwargs)
  File "/home/zapata/.local/lib/python3.5/site-packages/uptick/decorators.py", line 77, in new_func
    return ctx.invoke(f, *args, **kwargs)
  File "/home/zapata/.local/lib/python3.5/site-packages/click/core.py", line 535, in invoke
    return callback(*args, **kwargs)
  File "/home/zapata/.local/lib/python3.5/site-packages/click/decorators.py", line 17, in new_func
    return f(get_current_context(), *args, **kwargs)
  File "/home/zapata/.local/lib/python3.5/site-packages/uptick/decorators.py", line 98, in new_func
    return ctx.invoke(f, *args, **kwargs)
  File "/home/zapata/.local/lib/python3.5/site-packages/click/core.py", line 535, in invoke
    return callback(*args, **kwargs)
  File "/mnt/d/Projects/bitshares/bitshares-pricefeed/bitshares_pricefeed/cli.py", line 162, in update
    feed.derive(assets)
  File "/mnt/d/Projects/bitshares/bitshares-pricefeed/bitshares_pricefeed/pricefeed.py", line 496, in derive
    self.obtain_flags(symbol)
  File "/mnt/d/Projects/bitshares/bitshares-pricefeed/bitshares_pricefeed/pricefeed.py", line 101, in obtain_flags
    if (datetime.utcnow() - feed_age).total_seconds() > self.assetconf(symbol, "maxage"):
TypeError: can't subtract offset-naive and offset-aware datetimes

This seems to be caused by an update in python-bitshares: bitshares/python-bitshares@85eca5f