Neo-CLI v3.7.4 TestNet and MainNet Upgrade Notice

1 min readMay 20, 2024


Neo-CLI v3.7.4 was released on May 16th, 2024 and applied to the T5 TestNet on May 17th, 2024. This version is planned to be applied to MainNet on May 24th, 2024. Below is a list of improvements and optimizations included in this release:

  • Upgraded secp256k1 signature verification in CryptoLib native contract.
  • Support for Koblitz-based and Keccak256-based custom witness verification.
  • Support for Lambda and Linq in devpack.
  • Addition of multi Neo contract examples in devpack.
  • Support for invoking Application Logs by command line in Neo-CLI.

Please note:

Neo-CLI v3.7.4 is based on .NET 8.0. Please ensure your server OS can support it. Ubuntu users should ensure their version is not lower than 20.04.

This upgrade includes a fork at Block 5,450,000. Please ensure Neo-CLI is updated and resynced before May 24th. Do not use the old version of the config.json configuration file.

Please install the latest version of neo-modules.