diff --git a/Cargo.toml b/Cargo.toml
index 9ea7fa5..2685adb 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "external-command-rs"
-version = "0.1.0"
+version = "0.1.1"
 edition = "2024"
 authors = ["Hatter Jiang"]
 repository = "https://git.hatter.ink/hatter/external-command-rs"
diff --git a/src/lib.rs b/src/lib.rs
index 5fa9347..efb094e 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,43 +1,38 @@
-use base64::Engine;
 use base64::engine::general_purpose::STANDARD;
-use rust_util::{XResult, debugging, opt_result, simple_error};
-use serde::{Deserialize, de};
+use base64::Engine;
+use rust_util::{debugging, opt_result, simple_error, XResult};
+use serde::{de, Deserialize, Serialize};
 use serde_json::Value;
 use std::process::{Command, Output};
 
-#[derive(Debug, Deserialize)]
+#[derive(Debug, Serialize, Deserialize)]
 struct ErrorResult {
-    #[allow(dead_code)]
     pub success: bool,
     pub error: String,
 }
 
-#[derive(Debug, Deserialize)]
+#[derive(Debug, Serialize, Deserialize)]
 pub struct ExternalSpecResult {
-    #[allow(dead_code)]
     pub success: bool,
     pub agent: String,
     pub specification: String,
     pub commands: Vec<String>,
 }
 
-#[derive(Debug, Deserialize)]
+#[derive(Debug, Serialize, Deserialize)]
 struct ExternalPublicKeyResult {
-    #[allow(dead_code)]
     pub success: bool,
     pub public_key_base64: String,
 }
 
-#[derive(Debug, Deserialize)]
+#[derive(Debug, Serialize, Deserialize)]
 struct ExternalSignResult {
-    #[allow(dead_code)]
     pub success: bool,
     pub signature_base64: String,
 }
 
-#[derive(Debug, Deserialize)]
+#[derive(Debug, Serialize, Deserialize)]
 struct ExternalDhResult {
-    #[allow(dead_code)]
     pub success: bool,
     pub shared_secret_hex: String,
 }