1 Long: tlsv1.3 2 Help: Use TLSv1.3 or greater 3 Protocols: TLS 4 Added: 7.52.0 5 --- 6 Forces curl to use TLS version 1.3 or later when connecting to a remote TLS server. 7 8 Note that TLS 1.3 is only supported by a subset of TLS backends. At the time 9 of this writing, they are BoringSSL, NSS, and Secure Transport (on iOS 11 or 10 later, and macOS 10.13 or later). 11