Bitcoin, which recently hit record high of around $69,000, is up over 114% this year so far.
Ether, the coin linked to ethereum blockchain and the second largest crypto, also declined more than 6% to $4,400.
Dogecoin price fell over 4% to at $0.25 whereas Shiba Inu tumbled over 2% to $0.000051, as per CoinDesk.
The enhancement, called Taproot, is the most significant change to the bitcoin protocol since the SegWit block capacity change in 2017.
Bitcoin’s ride has been volatile as the most popular digital token plunged below $30,000 in June amid criticism of its energy consumption and China’s cryptocurrency crackdown.