diff --git a/gradle.properties b/gradle.properties
index 818a536..759e8ef 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,4 +1,4 @@
-org.gradle.jvmargs=-Xmx2g
+org.gradle.jvmargs=-Xmx4g -XX:MaxMetaspaceSize=512m -XX:+HeapDumpOnOutOfMemoryError
 org.gradle.parallel=true
 org.gradle.caching=true
 org.gradle.configureondemand=true
\ No newline at end of file
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 4769cc8..6a0b7c1 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
@@ -7,6 +7,7 @@ import com.eactive.ext.kjb.common.KjbPropertyHolder;
 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 lombok.extern.slf4j.Slf4j;
@@ -124,7 +125,7 @@ public class SmsAuthService {
             IUmsGsonObject content = null;
             content = VerifyPhoneUmsTemplate.builder().authNumber(authCode).build();
 
-            getUmsService().sendKakaoAlimTalk(guid, UmsBizWorkCode.VERIFY_PHONE, cleanedPhone, content);
+            getUmsService().sendKakaoAlimTalk(guid, UmsBizWorkCode.VERIFY_PHONE, cleanedPhone, GsonUtil.toJsonObject(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);