The founders of the Bitcoin mixer Samourai Wallet will plead guilty, the two responsible for the Bitcoin mixing application had previously pleaded not guilty when the U.S. Department of Justice charged them.

The formal indictment filed last year alleged that by offering Samourai as a privacy service, the defendants knew it was a haven for criminals engaged in large-scale money laundering and evading sanctions. Bitcoin mixers and other cryptocurrencies are services that obscure cryptocurrency transactions by combining them, making payments harder to trace.