diff --git a/src/cmd_simple_encrypt_decrypt.rs b/src/cmd_simple_encrypt_decrypt.rs
index c8d8792..ffec3ff 100644
--- a/src/cmd_simple_encrypt_decrypt.rs
+++ b/src/cmd_simple_encrypt_decrypt.rs
@@ -63,9 +63,9 @@ pub struct CmdSimpleDecrypt {
     #[arg(long, short = 'v')]
     pub value: Option<String>,
 
-    /// Decrypt result output type (plain, hex, bse64)
+    /// Decrypt result output format (plain, hex, bse64)
     #[arg(long, short = 'o')]
-    pub output_type: Option<String>,
+    pub output_format: Option<String>,
 }
 
 impl CmdSimpleEncrypt {
@@ -180,10 +180,10 @@ pub fn inner_simple_decrypt(cmd_simple_decrypt: CmdSimpleDecrypt) -> XResult<()>
     let pin = cmd_simple_decrypt.pin.clone().or_else(util_env::get_pin);
     let slot = cmd_simple_decrypt.slot.clone();
 
-    let output_type = cmd_simple_decrypt.output_type.as_deref().unwrap_or("plain");
-    match output_type {
+    let output_format = cmd_simple_decrypt.output_format.as_deref().unwrap_or("plain");
+    match output_format {
         "plain" | "hex" | "base64" => (),
-        _ => return simple_error!("not supported output type: {}", output_type),
+        _ => return simple_error!("not supported output format: {}", output_format),
     };
 
     let value = match cmd_simple_decrypt.get_value()? {
@@ -216,11 +216,11 @@ pub fn inner_simple_decrypt(cmd_simple_decrypt: CmdSimpleDecrypt) -> XResult<()>
         return simple_error!("too many envelops: {:?}, len: {}", cmd_simple_decrypt.key_id, filter_envelops.len());
     }
     let value = try_decrypt_key(&config, filter_envelops[0], &pin, &slot, false)?;
-    let value = match output_type {
+    let value = match output_format {
         "plain" => opt_result!(String::from_utf8(value), "bad value encoding: {}"),
         "hex" => hex::encode(&value),
         "base64" => STANDARD.encode(&value),
-        _ => return simple_error!("not supported output type: {}", output_type),
+        _ => return simple_error!("not supported output format: {}", output_format),
     };
     CmdResult::success(&value).print_exit();
 }
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