Input Output Hong Kong (IOHK), the blockchain engineering firm behind the Cardano network, has released some “disappointing news,” announcing a one-month delay to the long-awaited Vasil upgrade. The Vasil upgrade is set to provide a “massive performance improvement to Cardano” and its smart contract capabilities, according to Cardano co-founder Charles Hoskinson. It was previously slated to go through on June 29. However, the latest estimate is now set for the last week of July.