In Cargo.toml: https://github.com/rustls/hyper-rustls/blob/78d214b518e9238da26958bc37c699490332283d/Cargo.toml#L40C1-L41C1 in code: https://github.com/rustls/hyper-rustls/blob/78d214b518e9238da26958bc37c699490332283d/src/config.rs#L35C1-L36C1 This must be an issue, no?