diff --git a/mens-api/src/main/java/kr/xit/ens/kakao/v2/service/KkotalkEltrcDocService.java b/mens-api/src/main/java/kr/xit/ens/kakao/v2/service/KkotalkEltrcDocService.java
index 49ffd2e..2f64897 100644
--- a/mens-api/src/main/java/kr/xit/ens/kakao/v2/service/KkotalkEltrcDocService.java
+++ b/mens-api/src/main/java/kr/xit/ens/kakao/v2/service/KkotalkEltrcDocService.java
@@ -170,11 +170,11 @@ public class KkotalkEltrcDocService extends AbstractService implements
     public KkotalkDocDTO.EnvelopeStatusResponse findStatus(final KkotalkDocDTO.EnvelopeId reqDTO){
         validate(reqDTO, null);
 
-
+        String param = "{\"envelopeIds\":" + JsonUtils.toJson(List.of(reqDTO.getEnvelopeId())) + "}";
         KkotalkDTO.BulkStatusResponse res = webClient.exchangeKkotalk(
             HOST + API_BULKSTATUS[0],
             HttpMethod.valueOf(API_BULKSTATUS[1]),
-            JsonUtils.toJson(List.of(reqDTO.getEnvelopeId())),
+            param,
             KkotalkDTO.BulkStatusResponse.class,
             getRlaybsnmInfo(reqDTO));
         return res.getEnvelopeStatus().get(0);