AttributeError: module 'websocket' has no attribute 'WebSocketApp' #12

Hi, I tried importing and it gave following error.

>>> from polygon import WebSocketClient, STOCKS_CLUSTER
Traceback (most recent call last):
File "", line 1, in
File "/Users/kshitizsharma/miniconda3/lib/python3.6/site-packages/polygon/init.py", line 1, in
from .websocket import WebSocketClient, STOCKS_CLUSTER, FOREX_CLUSTER, CRYPTO_CLUSTER
File "/Users/kshitizsharma/miniconda3/lib/python3.6/site-packages/polygon/websocket/init.py", line 1, in
from .websocket_client import WebSocketClient, STOCKS_CLUSTER, FOREX_CLUSTER, CRYPTO_CLUSTER
File "/Users/kshitizsharma/miniconda3/lib/python3.6/site-packages/polygon/websocket/websocket_client.py", line 12, in
class WebSocketClient:
File "/Users/kshitizsharma/miniconda3/lib/python3.6/site-packages/polygon/websocket/websocket_client.py", line 21, in WebSocketClient
on_error: Optional[Callable[[websocket.WebSocketApp, str], None]] = None):
AttributeError: module 'websocket' has no attribute 'WebSocketApp'_

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