NameNotFound: Environment Pong doesn't exist.

[ToiLaKiet]

Hi guys, I am new to Reinforcement Learning, however, im doing a project about how to implement the game Pong. I have currently used OpenAI gym to import Pong-v0 environment, but that doesn't work. I have already tried this
!pip install "gym[accept-rom-license]"
but this still happens
NameNotFound: Environment Pong doesn't exist.

Please, help me with this. Thanks a lot.