By default Reqwest (and therefore Goose) uses the system-native transport layer security to make HTTPS requests. This means schannel on Windows, Security-Framework on macOS, and OpenSSL on Linux. If you'd prefer to use a pure Rust TLS implementation, disable default features and enable rustls-tls in Cargo.toml as follows:

goose = { version = "^0.16", default-features = false, features = ["rustls-tls"] }