diff --git a/src/main/java/org/ntlab/tampoposerver/models/ChatRooms.java b/src/main/java/org/ntlab/tampoposerver/models/ChatRooms.java
index eae2bce..71e8b36 100644
--- a/src/main/java/org/ntlab/tampoposerver/models/ChatRooms.java
+++ b/src/main/java/org/ntlab/tampoposerver/models/ChatRooms.java
@@ -48,7 +48,7 @@
         return new ArrayList<>(users);
     }
 
-    public void put(Integer chatRoomId, String chatRoomNumber) {
+    public void put(String chatRoomId, String chatRoomNumber) {
     }
 
 //    public Integer updateMessage() {