diff --git a/src/cmd_u2fsign.rs b/src/cmd_u2fsign.rs
index b3aa4d7..7f783b0 100644
--- a/src/cmd_u2fsign.rs
+++ b/src/cmd_u2fsign.rs
@@ -21,6 +21,7 @@ pub struct CommandImpl;
 
 impl Command for CommandImpl {
     fn name(&self) -> &str { "u2f-sign" }
+
     fn subcommand<'a>(&self) -> App<'a, 'a> {
         SubCommand::with_name(self.name()).about("FIDO U2F Sign subcommand")
             .arg(Arg::with_name("app-id").short("a").long("app-id").default_value("https://example.com").help("App id"))
@@ -31,6 +32,7 @@ impl Command for CommandImpl {
             .arg(Arg::with_name("key-handle").short("k").long("key-handle").takes_value(true).multiple(true).help("Key handle"))
             .arg(Arg::with_name("json").long("json").help("JSON output"))
     }
+
     fn run(&self, _arg_matches: &ArgMatches, sub_arg_matches: &ArgMatches) -> CommandError {
         let json_output = sub_arg_matches.is_present("json");
         if json_output { rust_util::util_msg::set_logger_std_out(false); }