Getting exception on run_forever() when attempting to get market feed for particular instruments

Installed latest SDK using
pip install dhanhq

try:
    dhan_feed = marketfeed.DhanFeed(client_id, access_token, instruments, 'V2')
    while True:
        dhan_feed.run_forever()
        response = dhan_feed.get_data()
        print(response)

except Exception as e:
    print(e)

The above code gives me exception as below
Unsupported version: V2
DEBUG:asyncio:Using proactor: IocpProactor

Use ‘v2’ in small, not in caps.