diff --git a/src/cmd_piv_ecsign.rs b/src/cmd_piv_ecsign.rs
index eb494ad..f21f47c 100644
--- a/src/cmd_piv_ecsign.rs
+++ b/src/cmd_piv_ecsign.rs
@@ -15,7 +15,7 @@ impl Command for CommandImpl {
     fn name(&self) -> &str { "piv-ecsign" }
 
     fn subcommand<'a>(&self) -> App<'a, 'a> {
-        SubCommand::with_name(self.name()).about("PIV EC sign(with SHA256) subcommand")
+        SubCommand::with_name(self.name()).about("PIV EC sign(with SHA256/SHA384) subcommand")
             .arg(cmdutil::build_slot_arg())
             .arg(cmdutil::build_pin_arg())
             .arg(cmdutil::build_no_pin_arg())