diff --git a/README.md b/README.md
index 97874cf..b7ff5f9 100644
--- a/README.md
+++ b/README.md
@@ -500,7 +500,7 @@ public class AddressTranslatorNA200H : AddressTranslator
 
 Modbus ASCII Support (Complete)
 Siemens PPI Support (Complete)
-OPC Write Data (Not test)
+OPC Write Data (Complete)
 ComConnector (Complete)
 Get and set bit value (Complete)
 Unit test (Not Complete)