Initial attempts to use Keep3r and Chainlink proved to be unreliable. It was clear that a new solution was needed. So, in April 2021, Unit Protocol underwent a major upgrade to address the issue. During that time, all $USDP borrowing limits were temporarily set to zero on all collaterals except ETH, which used Chainlink. During the upgrade, all oracles were successfully migrated to Chainlink. This solution meant that we could add even more collaterals, while also bringing down the overall expense of retrieving data. As we inherited the security underpinning Chainlink oracles, Unit Protocol now has the most accurate pricing data possible.