diff --git a/WeChat/Contracts/BasicAliPay.php b/WeChat/Contracts/BasicAliPay.php
index 732cac0..b2d320a 100644
--- a/WeChat/Contracts/BasicAliPay.php
+++ b/WeChat/Contracts/BasicAliPay.php
@@ -47,7 +47,7 @@ abstract class BasicAliPay
      * 静态缓存
      * @var static
      */
-    private static $cache;
+    protected static $cache;
 
     /**
      * 正常请求网关
diff --git a/WeChat/Contracts/BasicWeChat.php b/WeChat/Contracts/BasicWeChat.php
index 5d4a1c0..81c3645 100644
--- a/WeChat/Contracts/BasicWeChat.php
+++ b/WeChat/Contracts/BasicWeChat.php
@@ -52,7 +52,7 @@ class BasicWeChat
      * 静态缓存
      * @var static
      */
-    private static $cache;
+    protected static $cache;
 
     /**
      * 注册代替函数
diff --git a/WeChat/Contracts/BasicWePay.php b/WeChat/Contracts/BasicWePay.php
index 25b3f3b..55a7080 100644
--- a/WeChat/Contracts/BasicWePay.php
+++ b/WeChat/Contracts/BasicWePay.php
@@ -40,7 +40,7 @@ class BasicWePay
      * 静态缓存
      * @var static
      */
-    private static $cache;
+    protected static $cache;
 
     /**
      * WeChat constructor.