Long: tlsv1.0 Help: Use TLSv1.0 or greater Protocols: TLS Added: 7.34.0 --- Forces curl to use TLS version 1.0 or later when connecting to a remote TLS server. In old versions of curl this option was documented to allow _only_ TLS 1.0, but behavior was inconsistent depending on the TLS library. Use --tls-max if you want to set a maximum TLS version.