diff --git a/src/main/java/com/eactive/eai/adapter/controller/ApiAdapterController.java b/src/main/java/com/eactive/eai/adapter/controller/ApiAdapterController.java
index 213cc3a..fb4d78e 100644
--- a/src/main/java/com/eactive/eai/adapter/controller/ApiAdapterController.java
+++ b/src/main/java/com/eactive/eai/adapter/controller/ApiAdapterController.java
@@ -142,7 +142,7 @@ public class ApiAdapterController implements HttpAdapterServiceKey {
                 int httpStatus = servletResponse.getStatus();
                 if (httpStatus == 200) {
                 	// 업체별 aync response message 가 다르다.
-                	String asyncMsgStyle =  httpProp.getProperty("ASYNC_RTNMSG_TYPE", "").toUpperCase();
+                	String asyncMsgStyle =  httpProp.getProperty("ASYNC_RTNMSG_TYPE", "");
                 	String responseBody ="";
                 	if (asyncMsgStyle == null || asyncMsgStyle.trim().isEmpty()) {
                 		responseBody = makeResponseBodyMsg();