diff --git a/README.md b/README.md
index 5158151..332d696 100644
--- a/README.md
+++ b/README.md
@@ -4,6 +4,8 @@ thinkphp5.2 验证码类库
 ## 安装
 > composer require topthink/think-captcha
 
+## 在您的项目路由文件里添加路由支持
+> Route::get('/captcha/get_validate_code/[:id]', "\\think\\captcha\\CaptchaController@index");
 
 ##使用
 
@@ -30,4 +32,4 @@ $this->validate($data,[
 if(!captcha_check($captcha)){
  //验证失败
 };
-~~~
\ No newline at end of file
+~~~
diff --git a/src/Captcha.php b/src/Captcha.php
index 29f9dad..54636a5 100644
--- a/src/Captcha.php
+++ b/src/Captcha.php
@@ -8,15 +8,13 @@
 // +----------------------------------------------------------------------
 // | Author: yunwuxin <448901948@qq.com>
 // +----------------------------------------------------------------------
-
 namespace think\captcha;
-
 use think\facade\Session;
 
 class Captcha
 {
     protected $config = [
-        'seKey'    => 'ThinkPHP.CN',
+        'seKey'    => 'Wmnrj.Com',
         // 验证码加密密钥
         'codeSet'  => '2345678abcdefhijkmnpqrstuvwxyzABCDEFGHJKLMNPQRTUVWXY',
         // 验证码字符集合
@@ -106,20 +104,22 @@ public function __isset($name)
      */
     public function check($code, $id = '')
     {
+
         $key = $this->authcode($this->seKey) . $id;
+
         // 验证码不能为空
-        $secode = Session::get($key, '');
+        $secode = Session::get($key);
         if (empty($code) || empty($secode)) {
             return false;
         }
         // session 过期
         if (time() - $secode['verify_time'] > $this->expire) {
-            Session::delete($key, '');
+            Session::delete($key);
             return false;
         }
 
         if ($this->authcode(strtoupper($code)) == $secode['verify_code']) {
-            $this->reset && Session::delete($key, '');
+            $this->reset && Session::delete($key);
             return true;
         }
 
@@ -158,7 +158,9 @@ public function entry($id = '')
                 }
             }
             $dir->close();
-            $this->fontttf = $ttfs[array_rand($ttfs)];
+            $this->fontttf = $ttfs[1];
+        }else{
+            $this->fontttf = $this->fontttf.'.ttf';
         }
         $this->fontttf = $ttfPath . $this->fontttf;
 
@@ -187,8 +189,8 @@ public function entry($id = '')
         } else {
             for ($i = 0; $i < $this->length; $i++) {
                 $code[$i] = $this->codeSet[mt_rand(0, strlen($this->codeSet) - 1)];
-                $codeNX += mt_rand($this->fontSize * 1.2, $this->fontSize * 1.6);
-                imagettftext($this->im, $this->fontSize, mt_rand(-40, 40), $codeNX, $this->fontSize * 1.6, $this->color, $this->fontttf, $code[$i]);
+                $codeNX += $this->fontSize * 1.3;
+                imagettftext($this->im, $this->fontSize, 0, $codeNX, $this->fontSize * 1.4, $this->color, $this->fontttf, $code[$i]);
             }
         }
 
@@ -196,9 +198,9 @@ public function entry($id = '')
         $key                   = $this->authcode($this->seKey);
         $code                  = $this->authcode(strtoupper(implode('', $code)));
         $secode                = [];
-        $secode['verify_code'] = $code; // 把校验码保存到session
-        $secode['verify_time'] = time(); // 验证码创建时间
-        Session::set($key . $id, $secode, '');
+        $secode['verify_code'] = $code;
+        $secode['verify_time'] = time();
+        Session::set($key . $id, $secode);
 
         ob_start();
         // 输出图像
diff --git a/src/helper.php b/src/helper.php
index 7dd3cfb..6582024 100644
--- a/src/helper.php
+++ b/src/helper.php
@@ -9,13 +9,11 @@
 // | Author: yunwuxin <448901948@qq.com>
 // +----------------------------------------------------------------------
 
-Route::get('captcha/[:id]', "\\think\\captcha\\CaptchaController@index");
-
-Validate::extend('captcha', function ($value, $id = '') {
+think\facade\Validate::extend('captcha', function ($value, $id = '') {
     return captcha_check($value, $id);
 });
 
-Validate::setTypeMsg('captcha', ':attribute错误!');
+think\facade\Validate::setTypeMsg('captcha', ':attribute错误!');
 
 /**
  * @param string $id
@@ -34,7 +32,7 @@ function captcha($id = '', $config = [])
  */
 function captcha_src($id = '')
 {
-    return Url::build('/captcha' . ($id ? "/{$id}" : ''));
+    return think\facade\Url::build('/captcha/get_validate_code/' . ($id ? "/{$id}" : ''),[],'','api');
 }
 
 /**
@@ -46,6 +44,16 @@ function captcha_img($id = '')
     return '<img src="' . captcha_src($id) . '" alt="captcha" />';
 }
 
+/**
+ * @param string $id
+ * @param string $element 验证码HTML元素ID
+ * @return string
+ */
+function captcha_img_with_replacement($id = '', $element = 'alimx-captcha')
+{
+    return '<img src="' . captcha_src($id) . '" alt="captcha" class="' . $element . '" onclick="this.src=\''.captcha_src($id).'?\' + Math.random();" />';
+}
+
 /**
  * @param        $value
  * @param string $id
@@ -54,6 +62,6 @@ function captcha_img($id = '')
  */
 function captcha_check($value, $id = '')
 {
-    $captcha = new \think\captcha\Captcha((array) Config::pull('captcha'));
+    $captcha = new \think\captcha\Captcha((array) \think\facade\Config::pull('captcha'));
     return $captcha->check($value, $id);
 }