diff --git a/src/cmd_keypair_generate.rs b/src/cmd_keypair_generate.rs
index c7fa031..95c509e 100644
--- a/src/cmd_keypair_generate.rs
+++ b/src/cmd_keypair_generate.rs
@@ -22,7 +22,7 @@ impl Command for CommandImpl {
                     .long("type")
                     .required(true)
                     .takes_value(true)
-                    .help("Key type (e.g. p256, p384, p521, rsa1024, rsa2048)"),
+                    .help("Key type (e.g. p256, p384, p521, rsa1024, rsa2048, rsa3072, rsa4096)"),
             )
             .arg(
                 Arg::with_name("with-hmac-encrypt")