diff --git a/src/detections/configs.rs b/src/detections/configs.rs
index 2254014b..0fd82715 100644
--- a/src/detections/configs.rs
+++ b/src/detections/configs.rs
@@ -58,7 +58,7 @@ impl Default for ConfigReader<'_> {
     usage = "hayabusa.exe <INPUT> [OTHER-ACTIONS] [OPTIONS]",
     author = "Yamato Security (https://github.com/Yamato-Security/hayabusa) @SecurityYamato)",
     help_template = "\n{name}\n{author}\n\n{usage-heading}\n    {usage}\n\n{all-args}\n",
-    arg_required_else_help(true),
+    // arg_required_else_help(true),
     term_width = 400
 )]
 pub struct Config {
diff --git a/src/main.rs b/src/main.rs
index f19bc556..b7fe4801 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -89,6 +89,13 @@ impl App {
             return;
         }
         let analysis_start_time: DateTime<Local> = Local::now();
+        // Show usage when no arguments.
+        if std::env::args().len() == 1 {
+            self.output_logo();
+            configs::CONFIG.write().unwrap().app.print_help().ok();
+            println!();
+            return;
+        }
         if !configs::CONFIG.read().unwrap().args.quiet {
             self.output_logo();
             println!();