Cardano Developers Delay Vasil Upgrade, Citing Bugs

Seven bugs remained outstanding before the change could be completed.

AccessTimeIconJun 21, 2022 at 9:22 a.m. UTC
Updated May 11, 2023 at 6:42 p.m. UTC

Input Output (IOG), the development lab for the Cardano blockchain, didn't release Monday's planned Vasil hard fork on the Cardano testnet because of technical bugs, the team said on Tuesday.

Vasil, a network upgrade that would increase scaling capabilities on Cardano, is now slated for a late June release on Cardano's test network. Hard forks refer to a network upgrade in which blockchains validate and produce new blocks with predetermined new rules.

“The IOG engineering team is extremely close to finalizing the core work, with just seven bugs still outstanding to complete the hard fork work, with none currently ranked as ‘severe,” developers said. “After some consideration, we have agreed NOT to send the hard fork update proposal to the testnet today to allow more time for testing,” they added.

Developers said that “few outstanding items” were needed to confirm everything was “working as expected” and that they would “need a few more days” to do that. “This puts us behind schedule on our previously communicated target date of June 29 for a mainnet hard fork,” they said.

The final decision to upgrade the Cardano testnet will be made in consultation with the network’s decentralized application (dapp) development community. The developers must clear any critical issues in testing, conduct benchmarking tests for the software and inform the broader developer community to allow enough time to retest their dapps before the hard fork.

The delay didn't cause a drop in the price of Cardano’s ADA tokens. They were up 5.6% in the past 24 hours, outperforming bitcoin’s 3.9% rise.


Please note that our privacy policy, terms of use, cookies, and do not sell my personal information has been updated.

CoinDesk is an award-winning media outlet that covers the cryptocurrency industry. Its journalists abide by a strict set of editorial policies. In November 2023, CoinDesk was acquired by the Bullish group, owner of Bullish, a regulated, digital assets exchange. The Bullish group is majority-owned by; both companies have interests in a variety of blockchain and digital asset businesses and significant holdings of digital assets, including bitcoin. CoinDesk operates as an independent subsidiary with an editorial committee to protect journalistic independence. CoinDesk employees, including journalists, may receive options in the Bullish group as part of their compensation.

Shaurya Malwa

Shaurya is the Deputy Managing Editor for the Data & Tokens team, focusing on decentralized finance, markets, on-chain data, and governance across all major and minor blockchains.