diff --git a/src/main/java/com/munjaon/server/server/service/HealthCheckServer.java b/src/main/java/com/munjaon/server/server/service/HealthCheckServer.java
index cd4f912..c1caa5f 100644
--- a/src/main/java/com/munjaon/server/server/service/HealthCheckServer.java
+++ b/src/main/java/com/munjaon/server/server/service/HealthCheckServer.java
@@ -10,7 +10,7 @@ import java.util.ArrayList;
 import java.util.List;
 
 public class HealthCheckServer extends Service {
-    private static List<String> monitorLog = new ArrayList<>();
+    private static final List<String> monitorLog = new ArrayList<>();
     /** Lock Object */
     private static final Object msgMonitor = new Object();
 
@@ -20,7 +20,6 @@ public class HealthCheckServer extends Service {
     private String slackUrl;
     private int serverCycle;
 
-    private long LAST_QUEUE_CHECK_TIME = 0;
     private long LAST_SERVER_CHECK_TIME = 0;
 
     public HealthCheckServer(String serviceName) {
@@ -89,6 +88,7 @@ public class HealthCheckServer extends Service {
         CONFIG_CHECK_TIME = System.currentTimeMillis();
     }
 
+    @SuppressWarnings("unchecked")
     public void sendMonitorLog() {
         Slack slack = Slack.getInstance();
         try {