diff --git a/src/Exceptions/ApiException.php b/src/Exceptions/ApiException.php
index 1d5d65b..c2d2d89 100644
--- a/src/Exceptions/ApiException.php
+++ b/src/Exceptions/ApiException.php
@@ -12,26 +12,21 @@ class ApiException extends Exception
      * 返回到接口的验证码
      * @var int $response_code
      */
-    protected $response_code = 0;
+    protected $response_code = 400000;
 
     /**
      * ApiException constructor.
      * @param string $message
-     * @param int $response_code
      * @param Throwable|null $previous
      */
-    public function __construct(
-        $message,
-        $response_code = 400000,
-        Throwable $previous = null
-    ) {
-        parent::__construct($message, 0, $previous);
-        $this->response_code = $response_code;
+    public function __construct(string $message, Throwable $previous = null)
+    {
+        parent::__construct($message, $previous);
     }
 
-    public static function formException(Exception $e, $response_code = 400000)
+    public static function fromException(Exception $e)
     {
-        return new ApiException($e->getMessage(), $response_code, $e);
+        return new ApiException($e->getMessage(), $e);
     }
 
     /**
diff --git a/src/Exceptions/ApiInvalidParamException.php b/src/Exceptions/ApiInvalidParamException.php
index 2e96820..16282f2 100644
--- a/src/Exceptions/ApiInvalidParamException.php
+++ b/src/Exceptions/ApiInvalidParamException.php
@@ -4,8 +4,5 @@ namespace PdToolKit\Exceptions;
 
 class ApiInvalidParamException extends ApiException
 {
-    public function __construct($message, Throwable $previous = null)
-    {
-        parent::__construct($message, 400400, $previous);
-    }
+    protected $response_code = 400400;
 }
\ No newline at end of file
diff --git a/src/Exceptions/ApiSystemException.php b/src/Exceptions/ApiSystemException.php
index 7e21c12..7853af9 100644
--- a/src/Exceptions/ApiSystemException.php
+++ b/src/Exceptions/ApiSystemException.php
@@ -2,10 +2,14 @@
 
 namespace PdToolKit\Exceptions;
 
+use Throwable;
+
 class ApiSystemException extends ApiException
 {
+    protected $response_code = 400000;
+
     public function __construct($message = "网络波动，稍后再试", Throwable $previous = null)
     {
-        parent::__construct($message, 400000, $previous);
+        parent::__construct($message, $previous);
     }
 }
\ No newline at end of file