The city of Stratford agreed to pay an attacker more than $75,000 worth of Bitcoin in exchange for decryption keys to unlock its information systems following an April cyber attack.

According to an information update on the Stratford website, the city paid the attacker 10 Bitcoin — a digital form of currency — which was then valued at $7,509.13 each.

The city said it has submitted a cyber insurance claim, which should foot most of the bill. The city’s deductible is $15,000.