I noticed that #1268 introduced a dependency to an exact version of Microsoft.Bcl.AsyncInterfaces (8.0.0) . I assume this was a copy&paste mistake from the SshNet.Security.Cryptography dependency. Please changes this to a minimum version (>= 8.0.0), otherwise projects using SSH.NET will run into issues when trying to upgrade to a newer Microsoft.Bcl.AsyncInterfaces release.