Gemini, the bitcoin exchange founded by Cameron and Tyler Winklevoss, has teamed up with Nasdaq to beef up its defences against market manipulation — the latest sign that the cryptocurrency industry is trying to get past its Wild West days, The Wall Street Journal reports.

The deal comes as regulators have stepped up scrutiny of digital-currency exchanges in recent months. Securities and Exchange Commission officials have warned of potential fraud and manipulation on the largely unregulated trading venues.