diff --git a/src/Conf.php b/src/Conf.php
index ddae083..bea0595 100644
--- a/src/Conf.php
+++ b/src/Conf.php
@@ -32,7 +32,7 @@ class Conf extends SplBean
     public $fontSize  = 25;            // 字体大小
     public $length    = 4;             // 生成位数
     public $mime      = MIME::PNG;     // 设置类型
-    public $temp      = EASYSWOOLE_ROOT . '/Temp/Captcha/';  // 设置缓存目录
+    public $temp      = '/tmp';  // 设置缓存目录
 
     public function setTemp($temp){
         if (!is_dir($temp)) mkdir($temp,0755) && chmod($temp,0755);
diff --git a/src/VerifyCode.php b/src/VerifyCode.php
index beeaa4c..d3f3d05 100644
--- a/src/VerifyCode.php
+++ b/src/VerifyCode.php
@@ -56,6 +56,8 @@ function DrawCode($Code = null)
             $Code = substr(str_shuffle($this->charset), 0, $this->length);
         }
 
+        $Code = strval($Code);
+
         // 创建空白画布
         $this->imInstance = imagecreate($this->imageL, $this->imageH);
         // 设置背景颜色