diff --git a/swift-secure-enclave-tool.swift b/swift-secure-enclave-tool.swift
index 612a640..55a33b7 100644
--- a/swift-secure-enclave-tool.swift
+++ b/swift-secure-enclave-tool.swift
@@ -134,7 +134,7 @@ func computeSecureEnclaveP256Ecdh(privateKeyDataRepresentation: String, ephemera
     }
 }
 
-func exitWith(response: String) {
+func exitWith(_ response: String) {
     print(response);
     if (response.hasPrefix("ok:")) {
         exit(0)
@@ -145,66 +145,65 @@ func exitWith(response: String) {
 
 
 if (CommandLine.arguments.count == 1) {
-    exitWith(response: "err:require one argument")
+    exitWith("err:require one argument")
 }
 
 let action = CommandLine.arguments[1];
 
 if (action == "is_support_secure_enclave") {
-    exitWith(response: "ok:\(isSupportSecureEnclave())")
+    exitWith("ok:\(isSupportSecureEnclave())")
 }
 
 if (action == "generate_secure_enclave_p256_ecsign_keypair") {
-    exitWith(response: generateSecureEnclaveP256KeyPair(sign: true))
+    exitWith(generateSecureEnclaveP256KeyPair(sign: true))
 }
 
 if (action == "generate_secure_enclave_p256_ecdh_keypair") {
-    exitWith(response: generateSecureEnclaveP256KeyPair(sign: false))
+    exitWith(generateSecureEnclaveP256KeyPair(sign: false))
 }
 
 if (action == "recover_secure_enclave_p256_ecsign_public_key") {
     if (CommandLine.arguments.count != 3) {
-        exitWith(response: "err:require two arguments")
+        exitWith("err:require two arguments")
     }
     let response =  recoverSecureEnclaveP256PublicKey(
         privateKeyDataRepresentation: CommandLine.arguments[2], sign: true);
-    exitWith(response: response)
+    exitWith(response)
 }
 
 if (action == "recover_secure_enclave_p256_ecdh_public_key") {
     if (CommandLine.arguments.count != 3) {
-        exitWith(response: "err:require two arguments")
+        exitWith("err:require two arguments")
     }
     let response =  recoverSecureEnclaveP256PublicKey(
         privateKeyDataRepresentation: CommandLine.arguments[2], sign: false);
-    exitWith(response: response)
+    exitWith(response)
 }
 
 if (action == "compute_secure_enclave_p256_ecsign") {
     if (CommandLine.arguments.count != 4) {
-        exitWith(response: "err:require three arguments")
+        exitWith("err:require three arguments")
     }
     let response =  computeSecureEnclaveP256Ecsign(
         privateKeyDataRepresentation: CommandLine.arguments[2],
         content: CommandLine.arguments[3]
     );
-    exitWith(response: response)
+    exitWith(response)
 }
 
 if (action == "compute_secure_enclave_p256_ecdh") {
     if (CommandLine.arguments.count != 4) {
-        exitWith(response: "err:require three arguments")
+        exitWith("err:require three arguments")
     }
     let response =  computeSecureEnclaveP256Ecdh(
         privateKeyDataRepresentation: CommandLine.arguments[2],
         ephemeraPublicKey: CommandLine.arguments[3]
     );
-    exitWith(response: response)
+    exitWith(response)
 }
 
 if (action == "version") {
-    exitWith(response: "ok:1.0.0-20250118")
+    exitWith("ok:1.0.0-20250118")
 }
 
-print("err:unknown action")
-exit(1)
\ No newline at end of file
+exitWith("err:unknown action")