diff --git a/apps/front/src/context.tsx b/apps/front/src/context.tsx
index 1ff3d89..a62c55c 100644
--- a/apps/front/src/context.tsx
+++ b/apps/front/src/context.tsx
@@ -3,7 +3,13 @@ import { createContext, FC, useContext, useEffect, useState } from "react";
 
 import { defaultState } from "./constants";
 import { ContextData, ContextValue } from "./types/context";
-import { isArrayOf, isMessage, isRoom } from "@roomruler/messages";
+import {
+  composeMessage,
+  isListMessage,
+  isMessage,
+  isUpdateMessage,
+  UpdateMessage,
+} from "@roomruler/messages";
 import { WS_URL } from "./config";
 import { RoomDisplay, RoomState } from "./types/room";
 
@@ -14,31 +20,51 @@ const ws = new WebSocket(WS_URL);
 export const RoomContextProvider: FC = ({ children }) => {
   const [state, setState] = useState<ContextData>(defaultState);
 
-  const toggleFree = (index: number) => {};
+  const toggleFree = (id: number) => {
+    ws.send(
+      JSON.stringify(
+        composeMessage<UpdateMessage>("update", {
+          id,
+          value: !state.char[state.ids[id]].free,
+        })
+      )
+    );
+  };
 
   useEffect(() => {
     ws.onmessage = ({ data }) => {
       const message: unknown = JSON.parse(data);
-      if (isMessage(message) && isArrayOf(message.args, isRoom)) {
-        const map: RoomDisplay[] = [],
-          char: RoomState[] = [],
-          ids: Record<number, number> = {};
+      if (isMessage(message)) {
+        if (isListMessage(message)) {
+          const map: RoomDisplay[] = [],
+            char: RoomState[] = [],
+            ids: Record<number, number> = {};
 
-        for (const {
-          x,
-          y,
-          height: h,
-          width: w,
-          title,
-          free,
-          id,
-        } of message.args) {
-          map.push({ coordinates: { x, y }, size: { w, h }, title: title });
-          char.push({ free });
-          ids[id] = map.length - 1;
+          for (const {
+            x,
+            y,
+            height: h,
+            width: w,
+            title,
+            free,
+            id,
+          } of message.args) {
+            map.push({ coordinates: { x, y }, size: { w, h }, title: title });
+            char.push({ free });
+            ids[id] = map.length - 1;
+          }
+
+          setState({ map, char, ids });
+        } else if (isUpdateMessage(message)) {
+          setState(
+            produce((draft) => {
+              const { id, value } = message.args;
+              const index = draft.ids[id];
+
+              draft.char[index].free = value;
+            })
+          );
         }
-
-        setState({ map, char, ids });
       }
     };
   }, []);