diff --git a/src/main/java/com/eactive/eai/adapter/http/client/impl/HttpClient5AdapterServiceRest.java b/src/main/java/com/eactive/eai/adapter/http/client/impl/HttpClient5AdapterServiceRest.java
index 1cce281..846d66e 100644
--- a/src/main/java/com/eactive/eai/adapter/http/client/impl/HttpClient5AdapterServiceRest.java
+++ b/src/main/java/com/eactive/eai/adapter/http/client/impl/HttpClient5AdapterServiceRest.java
@@ -811,7 +811,17 @@ public class HttpClient5AdapterServiceRest extends HttpClient5AdapterServiceSupp
 			}
 		}
 		//전문에서 추출한 httpHeader값 외 어댑터에서 최종적으로 적용되도록,
-		String httpSettingJsonStr = prop.getProperty( HTTP_HEADER_SETTING , "{}");
+		String httpSettingJsonStr = prop.getProperty( HTTP_HEADER_SETTING );
+		
+		if( StringUtils.isBlank(httpSettingJsonStr) )
+		{
+			if( logger.isInfoEnabled() ) {
+				logger.info("HTTP_HEADER_SETTING value is not JSONObject Type, skip.");
+			}
+				
+			return;
+		}
+		
 		try {
 			JSONObject httpValues = (JSONObject) JSONValue.parse(httpSettingJsonStr);