diff --git a/fe/src/pages/ChatRoom.tsx b/fe/src/pages/ChatRoom.tsx
index 672735a18..6db476a2f 100644
--- a/fe/src/pages/ChatRoom.tsx
+++ b/fe/src/pages/ChatRoom.tsx
@@ -72,7 +72,7 @@ export const ChatRoom = () => {
     client.deactivate();
   };
 
-  const callback = (message) => {
+  const callback = (message: StompJs.Message) => {
     if (message.body) {
       const newMessage = JSON.parse(message.body);
       setChatList((chats) => [...chats, newMessage.messages]);