cannot be built because it requires rustc 1.64.0 or newer, while the currently active rustc version is 1.63.0

[kpaxradio]

In
$sudo cargo install solo

I have an error

Updating crates.io index
Installing solo2 v0.2.2
error: failed to compile solo2 v0.2.2, intermediate artifacts can be found at /tmp/cargo-installlLTNKN
Caused by:
package anstyle-query v1.0.0 cannot be built because it requires rustc 1.64.0 or newer, while the currently active rustc version is 1.63.0
Try re-running cargo install with --locked

I try also

$sudo cargo install solo2 --locked

and get similar error

Updating crates.io index
Installing solo2 v0.2.2
warning: package spin v0.9.4 in Cargo.lock is yanked in registry crates-io, consider running without --locked
error: failed to compile solo2 v0.2.2, intermediate artifacts can be found at /tmp/cargo-installjE7ZG1

Caused by:
package clap v4.1.1 cannot be built because it requires rustc 1.64.0 or newer, while the currently active rustc version is 1.63.0

I tried to put from https://rustup.rs/
as
$curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh

but it doesn't seem to see the newer one in the command
$sudo cargo install solo

how can I use only the newer rustup version for installing solo2 ?

[BeesBoxler]

if you already have rustup installed, running rustup update will update to the latest version (1.72.1 as of me typing this)