diff --git a/php/src/Kernel/CertEnvironment.php b/php/src/Kernel/CertEnvironment.php
index 7361b0c..05fbe48 100644
--- a/php/src/Kernel/CertEnvironment.php
+++ b/php/src/Kernel/CertEnvironment.php
@@ -5,7 +5,7 @@
 
 
 use Alipay\EasySDK\Kernel\Util\AntCertificationUtil;
-use http\Exception\RuntimeException;
+use Alipay\EasySDK\Kernel\Exceptions\RuntimeException;
 
 class CertEnvironment
 {