Gym: cannot import univserse: No module named 'gym.benchmarks'

[TaeheeJeong]

I successfully installed gym-0.17.0 with universe-0.21.3
but when I tried to 'import universe', the following error comes out.

ModuleNotFoundError: No module named 'gym.benchmarks'

I already tried to 'pip uninstall gym, pip install gym==0.9.5'.
but my gym version does not change at all.

[christopherhesse]

I'm afraid universe is deprecated and no longer supported