diff --git a/ServicesCenter/WCF/OpcServerHost/App.config b/ServicesCenter/WCF/OpcServerHost/App.config
index aa99859..22798cb 100644
--- a/ServicesCenter/WCF/OpcServerHost/App.config
+++ b/ServicesCenter/WCF/OpcServerHost/App.config
@@ -3,7 +3,7 @@
   <appSettings>
     <add key="ServerAddressIP" value="net.tcp://127.0.0.1:4444/OpcService"/>
     <!--<add key="OPCServerIP" value="10.111.226.150" />-->
-    <add key="OPCServerIP" value="10.111.144.99" />
+    <add key="OPCServerIP" value="127.0.0.1" />
     <add key="OPCServerName" value="Kepware.KEPServerEX.V6" />
     <!--<add key="OPCServerName" value="kepware.KEPServerEX.V5" />-->
     <add key="PRODUCELINE" value="CFAACD" />