Cannot import dronekit on Python 3

Hello.

I am trying make programs with dronekit and python 3 on windows 10 1809. But when I import dronekit library, python shows error like bellow.

>>> from dronekit import connect
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "C:\Users\otsuka\AppData\Local\Programs\Python\Python37-32\lib\site-packages\dronekit\__init__.py", line 2192
    await = set(types)
          ^
SyntaxError: invalid syntax

Must I use python 2.7?

Thank you.