Crypto exchange Binance is keeping trading and withdrawals suspended due to a risk warning, even after completion of their extended four hour scheduled upgrade today, June 26, according to a support notice from Binance.

Binance had posted earlier about the added time of the upgrade, then added an update that the upgrade was complete and trading would begin at 9:30 am (UTC). However, another updatefollowed, noting of the continued suspension of trading and withdrawals due to a warning after a pre-trade check by their risk management system:

“Due to a warning from a pre-trade check in our risk management system, we will postpone the start of trading and withdrawals.

 Please stay tuned for more information regarding the reopening of trading and withdrawals.

 We apologize for any inconvenience and thank you for your patience.”

In January, crypto exchange Kraken also experienced an unexpected delay during an upgrade, staying down for more than 48 hours before resuming normal activity.

Binance is ranked fifth among exchanges by daily trading volume on Coinmarketcap, having traded around $629 million over a 24 hour period to press time.