diff --git a/src/main/java/com/eactive/eai/rms/ext/kjb/smsauth/SmsAuthService.java b/src/main/java/com/eactive/eai/rms/ext/kjb/smsauth/SmsAuthService.java
index 6a0b7c1..ea0a1fa 100644
--- a/src/main/java/com/eactive/eai/rms/ext/kjb/smsauth/SmsAuthService.java
+++ b/src/main/java/com/eactive/eai/rms/ext/kjb/smsauth/SmsAuthService.java
@@ -8,8 +8,8 @@ import com.eactive.ext.kjb.common.KjbUmsException;
 import com.eactive.ext.kjb.ums.KjbUmsService;
 import com.eactive.ext.kjb.ums.UmsBizWorkCode;
 import com.eactive.ext.kjb.ums.gson.GsonUtil;
-import com.eactive.ext.kjb.ums.gson.IUmsGsonObject;
 import com.eactive.ext.kjb.ums.gson.VerifyPhoneUmsTemplate;
+import com.google.gson.JsonObject;
 import lombok.extern.slf4j.Slf4j;
 import org.apache.commons.lang3.StringUtils;
 
@@ -122,10 +122,9 @@ public class SmsAuthService {
             String guid = String.format("EAPIM_EMS-%s",
                     DateTimeFormatter.ofPattern("yyyyMMddHHmmssSSS").format(LocalDateTime.now()));
 
-            IUmsGsonObject content = null;
-            content = VerifyPhoneUmsTemplate.builder().authNumber(authCode).build();
+            JsonObject content = GsonUtil.toJsonObject(VerifyPhoneUmsTemplate.builder().authNumber(authCode).build());
 
-            getUmsService().sendKakaoAlimTalk(guid, UmsBizWorkCode.VERIFY_PHONE, cleanedPhone, GsonUtil.toJsonObject(content));
+            getUmsService().sendKakaoAlimTalk(guid, UmsBizWorkCode.VERIFY_PHONE, cleanedPhone, content);
             log.info("SMS 인증번호 발송 완료 - guid: {}, phone: {}****{}",
                     guid, cleanedPhone.substring(0, 3), cleanedPhone.substring(cleanedPhone.length() - 4));
             log.debug("SMS 인증번호 발송 - authCode: {}", authCode);