diff --git a/src/SKIT.FlurlHttpClient.Wechat.Api/Utilities/WxBizMsgCryptor.cs b/src/SKIT.FlurlHttpClient.Wechat.Api/Utilities/WxBizMsgCryptor.cs
index 5224bc6b..cc5fa6a6 100644
--- a/src/SKIT.FlurlHttpClient.Wechat.Api/Utilities/WxBizMsgCryptor.cs
+++ b/src/SKIT.FlurlHttpClient.Wechat.Api/Utilities/WxBizMsgCryptor.cs
@@ -270,6 +270,7 @@ namespace SKIT.FlurlHttpClient.Wechat.Api.Utilities
             try
             {
                 XmlDocument xmlDoc = new XmlDocument();
+                xmlDoc.XmlResolver = null;
                 xmlDoc.LoadXml(xml);
 
                 XmlNode? xmlRoot = xmlDoc.FirstChild;
diff --git a/src/SKIT.FlurlHttpClient.Wechat.Work/Utilities/WxBizMsgCryptor.cs b/src/SKIT.FlurlHttpClient.Wechat.Work/Utilities/WxBizMsgCryptor.cs
index ab99c05f..7f649a43 100644
--- a/src/SKIT.FlurlHttpClient.Wechat.Work/Utilities/WxBizMsgCryptor.cs
+++ b/src/SKIT.FlurlHttpClient.Wechat.Work/Utilities/WxBizMsgCryptor.cs
@@ -273,6 +273,7 @@ namespace SKIT.FlurlHttpClient.Wechat.Work.Utilities
             try
             {
                 XmlDocument xmlDoc = new XmlDocument();
+                xmlDoc.XmlResolver = null;
                 xmlDoc.LoadXml(xml);
 
                 XmlNode? xmlRoot = xmlDoc.FirstChild;