diff --git a/.env.development b/.env.development
index 3c65c87..273dfb3 100644
--- a/.env.development
+++ b/.env.development
@@ -1 +1,2 @@
-PORT=3002
\ No newline at end of file
+PORT=
+CORS_ORIGIN=
diff --git a/README.md b/README.md
index 7fc58d3..360448f 100755
--- a/README.md
+++ b/README.md
@@ -1,7 +1,11 @@
-# Excalidraw Portal
+# Example of excalidraw collaboration server
 
 Collaboration server for Excalidraw
 
+If you need to use cluster mode with pm2. Checkout: https://socket.io/docs/v4/pm2/
+
+If you are not familiar with pm2: https://pm2.keymetrics.io/docs/usage/quick-start/
+
 # Development
 
 - install
@@ -16,6 +20,8 @@ Collaboration server for Excalidraw
   yarn start:dev
   ```
 
-# Deployment
+# Start with pm2
 
-NOTE: currently the server IS NOT deployed automatically on push to the `master` branch, and must be done so manually by an admin.
+```
+pm2 start pm2.production.json
+```
diff --git a/package.json b/package.json
index b7fc91a..9aefb3d 100644
--- a/package.json
+++ b/package.json
@@ -5,7 +5,6 @@
     "@types/debug": "4.1.5",
     "@types/express": "4.17.11",
     "@types/node": "14.14.31",
-    "@types/socket.io": "2.1.4",
     "@typescript-eslint/eslint-plugin": "4.16.1",
     "@typescript-eslint/parser": "4.16.1",
     "cross-env": "^7.0.3",
@@ -16,7 +15,7 @@
     "eslint-plugin-prettier": "3.3.1",
     "express": "4.17.1",
     "prettier": "2.2.1",
-    "socket.io": "2.3.0",
+    "socket.io": "^4.6.1",
     "ts-node-dev": "^1.1.8",
     "typescript": "4.2.3"
   },
diff --git a/pm2.json b/pm2.json
index d77c3c8..6c2debf 100644
--- a/pm2.json
+++ b/pm2.json
@@ -1,5 +1,5 @@
 {
-  "name": "webex-collab-dev",
+  "name": "excalidraw-collab-dev",
   "script": "./dist/index.js",
   "watch": ["src/"],
   "ignore_watch": ["node_modules", "public"],
diff --git a/pm2.production.json b/pm2.production.json
new file mode 100644
index 0000000..d3dd3ce
--- /dev/null
+++ b/pm2.production.json
@@ -0,0 +1,15 @@
+{
+  "name": "excalidraw-collab",
+  "script": "./dist/index.js",
+  "ignore_watch": ["node_modules", "public"],
+  "max_memory_restart": "4G",
+  "watch": false,
+  "wait_ready": true,
+  "log_date_format": "YYYY-MM-DD HH:mm Z",
+  "autorestart": true,
+  "exec_mode": "fork_mode",
+  "instances": 1,
+  "env": {
+    "NODE_ENV": "production"
+  }
+}
diff --git a/pm2production.json b/pm2production.json
deleted file mode 100644
index e28c695..0000000
--- a/pm2production.json
+++ /dev/null
@@ -1,10 +0,0 @@
-{
-  "name": "webex-collab",
-  "script": "./dist/index.js",
-  "autorestart": true,
-  "exec_mode": "fork_mode",
-  "instances": 1,
-  "env": {
-    "NODE_ENV": "production"
-  }
-}
diff --git a/src/index.ts b/src/index.ts
index 6c9da5e..7e6f7e0 100755
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,7 +1,7 @@
 import debug from "debug";
 import express from "express";
 import http from "http";
-import socketIO from "socket.io";
+import { Server as SocketIO } from "socket.io";
 
 const serverDebug = debug("server");
 const ioDebug = debug("io");
@@ -14,7 +14,8 @@ require("dotenv").config(
 );
 
 const app = express();
-const port = process.env.PORT || 80; // default port to listen
+const port =
+  process.env.PORT || process.env.NODE_ENV !== "development" ? 80 : 3002; // default port to listen
 
 app.use(express.static("public"));
 
@@ -28,67 +29,76 @@ server.listen(port, () => {
   serverDebug(`listening on port: ${port}`);
 });
 
-const io = socketIO(server, {
-  handlePreflightRequest: (req, res) => {
-    const headers = {
-      "Access-Control-Allow-Headers": "Content-Type, Authorization",
-      "Access-Control-Allow-Origin":
-        (req.header && req.header.origin) || "https://excalidraw.com",
-      "Access-Control-Allow-Credentials": true,
-    };
-    res.writeHead(200, headers);
-    res.end();
-  },
-});
-
-io.on("connection", (socket) => {
-  ioDebug("connection established!");
-  io.to(`${socket.id}`).emit("init-room");
-  socket.on("join-room", (roomID) => {
-    socketDebug(`${socket.id} has joined ${roomID}`);
-    socket.join(roomID);
-    if (io.sockets.adapter.rooms[roomID].length <= 1) {
-      io.to(`${socket.id}`).emit("first-in-room");
-    } else {
-      socket.broadcast.to(roomID).emit("new-user", socket.id);
-    }
-    io.in(roomID).emit(
-      "room-user-change",
-      Object.keys(io.sockets.adapter.rooms[roomID].sockets),
-    );
+try {
+  const io = new SocketIO(server, {
+    transports: ["websocket", "polling"],
+    cors: {
+      allowedHeaders: ["Content-Type", "Authorization"],
+      origin: process.env.CORS_ORIGIN || "*",
+      credentials: true,
+    },
+    allowEIO3: true,
   });
 
-  socket.on(
-    "server-broadcast",
-    (roomID: string, encryptedData: ArrayBuffer, iv: Uint8Array) => {
-      socketDebug(`${socket.id} sends update to ${roomID}`);
-      socket.broadcast.to(roomID).emit("client-broadcast", encryptedData, iv);
-    },
-  );
-
-  socket.on(
-    "server-volatile-broadcast",
-    (roomID: string, encryptedData: ArrayBuffer, iv: Uint8Array) => {
-      socketDebug(`${socket.id} sends volatile update to ${roomID}`);
-      socket.volatile.broadcast
-        .to(roomID)
-        .emit("client-broadcast", encryptedData, iv);
-    },
-  );
-
-  socket.on("disconnecting", () => {
-    const rooms = io.sockets.adapter.rooms;
-    for (const roomID in socket.rooms) {
-      const clients = Object.keys(rooms[roomID].sockets).filter(
-        (id) => id !== socket.id,
-      );
-      if (clients.length > 0) {
-        socket.broadcast.to(roomID).emit("room-user-change", clients);
+  io.on("connection", (socket) => {
+    ioDebug("connection established!");
+    io.to(`${socket.id}`).emit("init-room");
+    socket.on("join-room", async (roomID) => {
+      socketDebug(`${socket.id} has joined ${roomID}`);
+      await socket.join(roomID);
+      const sockets = await io.in(roomID).fetchSockets();
+      if (sockets.length <= 1) {
+        io.to(`${socket.id}`).emit("first-in-room");
+      } else {
+        socketDebug(`${socket.id} new-user emitted to room ${roomID}`);
+        socket.broadcast.to(roomID).emit("new-user", socket.id);
       }
-    }
-  });
 
-  socket.on("disconnect", () => {
-    socket.removeAllListeners();
+      io.in(roomID).emit(
+        "room-user-change",
+        sockets.map((socket) => socket.id),
+      );
+    });
+
+    socket.on(
+      "server-broadcast",
+      (roomID: string, encryptedData: ArrayBuffer, iv: Uint8Array) => {
+        socketDebug(`${socket.id} sends update to ${roomID}`);
+        socket.broadcast.to(roomID).emit("client-broadcast", encryptedData, iv);
+      },
+    );
+
+    socket.on(
+      "server-volatile-broadcast",
+      (roomID: string, encryptedData: ArrayBuffer, iv: Uint8Array) => {
+        socketDebug(`${socket.id} sends volatile update to ${roomID}`);
+        socket.volatile.broadcast
+          .to(roomID)
+          .emit("client-broadcast", encryptedData, iv);
+      },
+    );
+
+    socket.on("disconnecting", async () => {
+      socketDebug(`${socket.id} has disconnected`);
+      for (const roomID in socket.rooms) {
+        const otherClients = (await io.in(roomID).fetchSockets()).filter(
+          (_socket) => _socket.id !== socket.id,
+        );
+
+        if (otherClients.length > 0) {
+          socket.broadcast.to(roomID).emit(
+            "room-user-change",
+            otherClients.map((socket) => socket.id),
+          );
+        }
+      }
+    });
+
+    socket.on("disconnect", () => {
+      socket.removeAllListeners();
+      socket.disconnect();
+    });
   });
-});
+} catch (error) {
+  console.error(error);
+}
diff --git a/yarn.lock b/yarn.lock
index a8c156d..2651d4f 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -69,6 +69,11 @@
     "@nodelib/fs.scandir" "2.1.4"
     fastq "^1.6.0"
 
+"@socket.io/component-emitter@~3.1.0":
+  version "3.1.0"
+  resolved "https://registry.yarnpkg.com/@socket.io/component-emitter/-/component-emitter-3.1.0.tgz#96116f2a912e0c02817345b3c10751069920d553"
+  integrity sha512-+9jVqKhRSpsc591z5vX+X5Yyw+he/HCB4iQ/RYxw35CEPaY1gnsNE43nf9n9AaYjAQrTiI/mOwKUKdUs9vf7Xg==
+
 "@types/body-parser@*":
   version "1.19.0"
   resolved "https://registry.yarnpkg.com/@types/body-parser/-/body-parser-1.19.0.tgz#0685b3c47eb3006ffed117cdd55164b61f80538f"
@@ -84,6 +89,18 @@
   dependencies:
     "@types/node" "*"
 
+"@types/cookie@^0.4.1":
+  version "0.4.1"
+  resolved "https://registry.yarnpkg.com/@types/cookie/-/cookie-0.4.1.tgz#bfd02c1f2224567676c1545199f87c3a861d878d"
+  integrity sha512-XW/Aa8APYr6jSVVA1y/DEIZX0/GMKLEVekNG727R8cs56ahETkRAy/3DR7+fJyh7oUgGwNQaRfXCun0+KbWY7Q==
+
+"@types/cors@^2.8.12":
+  version "2.8.13"
+  resolved "https://registry.yarnpkg.com/@types/cors/-/cors-2.8.13.tgz#b8ade22ba455a1b8cb3b5d3f35910fd204f84f94"
+  integrity sha512-RG8AStHlUiV5ysZQKq97copd2UmVYw3/pRMLefISZ3S1hK104Cwm7iLQ3fTKx+lsUH2CE8FlLaYeEA2LSeqYUA==
+  dependencies:
+    "@types/node" "*"
+
 "@types/debug@4.1.5":
   version "4.1.5"
   resolved "https://registry.yarnpkg.com/@types/debug/-/debug-4.1.5.tgz#b14efa8852b7768d898906613c23f688713e02cd"
@@ -123,6 +140,11 @@
   resolved "https://registry.yarnpkg.com/@types/node/-/node-14.14.31.tgz#72286bd33d137aa0d152d47ec7c1762563d34055"
   integrity sha512-vFHy/ezP5qI0rFgJ7aQnjDXwAMrG0KqqIH7tQG5PPv3BWBayOPIQNBjVc/P6hhdZfMx51REc6tfDNXHUio893g==
 
+"@types/node@>=10.0.0":
+  version "20.1.4"
+  resolved "https://registry.yarnpkg.com/@types/node/-/node-20.1.4.tgz#83f148d2d1f5fe6add4c53358ba00d97fc4cdb71"
+  integrity sha512-At4pvmIOki8yuwLtd7BNHl3CiWNbtclUbNtScGx4OHfBd4/oWoJC8KRCIxXwkdndzhxOsPXihrsOoydxBjlE9Q==
+
 "@types/qs@*":
   version "6.9.1"
   resolved "https://registry.yarnpkg.com/@types/qs/-/qs-6.9.1.tgz#937fab3194766256ee09fcd40b781740758617e7"
@@ -141,13 +163,6 @@
     "@types/express-serve-static-core" "*"
     "@types/mime" "*"
 
-"@types/socket.io@2.1.4":
-  version "2.1.4"
-  resolved "https://registry.yarnpkg.com/@types/socket.io/-/socket.io-2.1.4.tgz#674e7bc193c5ccdadd4433f79f3660d31759e9ac"
-  integrity sha512-cI98INy7tYnweTsUlp8ocveVdAxENUThO0JsLSCs51cjOP2yV5Mqo5QszMDPckyRRA+PO6+wBgKvGvHUCc23TQ==
-  dependencies:
-    "@types/node" "*"
-
 "@types/strip-bom@^3.0.0":
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/@types/strip-bom/-/strip-bom-3.0.0.tgz#14a8ec3956c2e81edb7520790aecf21c290aebd2"
@@ -246,11 +261,6 @@ acorn@^7.4.0:
   resolved "https://registry.yarnpkg.com/acorn/-/acorn-7.4.1.tgz#feaed255973d2e77555b83dbc08851a6c63520fa"
   integrity sha512-nQyp0o1/mNdbTO1PO6kHkwSrmgZ0MT/jCCpNiwbUjGoRN4dlBhqJtoQuCnEOKzgTVwg0ZWiCoQy6SxMebQVh8A==
 
-after@0.8.2:
-  version "0.8.2"
-  resolved "https://registry.yarnpkg.com/after/-/after-0.8.2.tgz#fedb394f9f0e02aa9768e702bda23b505fae7e1f"
-  integrity sha1-/ts5T58OAqqXaOcCvaI7UF+ufh8=
-
 ajv@^6.10.0, ajv@^6.12.4:
   version "6.12.6"
   resolved "https://registry.yarnpkg.com/ajv/-/ajv-6.12.6.tgz#baf5a62e802b07d977034586f8c3baf5adf26df4"
@@ -325,58 +335,26 @@ array-union@^2.1.0:
   resolved "https://registry.yarnpkg.com/array-union/-/array-union-2.1.0.tgz#b798420adbeb1de828d84acd8a2e23d3efe85e8d"
   integrity sha512-HGyxoOTYUyCM6stUe6EJgnd4EoewAI7zMdfqO+kGjnlZmBDz/cR5pf8r/cR4Wq60sL/p0IkcjUEEPwS3GFrIyw==
 
-arraybuffer.slice@~0.0.7:
-  version "0.0.7"
-  resolved "https://registry.yarnpkg.com/arraybuffer.slice/-/arraybuffer.slice-0.0.7.tgz#3bbc4275dd584cc1b10809b89d4e8b63a69e7675"
-  integrity sha512-wGUIVQXuehL5TCqQun8OW81jGzAWycqzFF8lFp+GOM5BXLYj3bKNsYC4daB7n6XjCqxQA/qgTJ+8ANR3acjrog==
-
 astral-regex@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/astral-regex/-/astral-regex-2.0.0.tgz#483143c567aeed4785759c0865786dc77d7d2e31"
   integrity sha512-Z7tMw1ytTXt5jqMcOP+OQteU1VuNK9Y02uuJtKQ1Sv69jXQKKg5cibLwGJow8yzZP+eAc18EmLGPal0bp36rvQ==
 
-async-limiter@~1.0.0:
-  version "1.0.1"
-  resolved "https://registry.yarnpkg.com/async-limiter/-/async-limiter-1.0.1.tgz#dd379e94f0db8310b08291f9d64c3209766617fd"
-  integrity sha512-csOlWGAcRFJaI6m+F2WKdnMKr4HhdhFVBk0H/QbJFMCr+uO2kwohwXQPxw/9OCxp05r5ghVBFSyioixx3gfkNQ==
-
-backo2@1.0.2:
-  version "1.0.2"
-  resolved "https://registry.yarnpkg.com/backo2/-/backo2-1.0.2.tgz#31ab1ac8b129363463e35b3ebb69f4dfcfba7947"
-  integrity sha1-MasayLEpNjRj41s+u2n038+6eUc=
-
 balanced-match@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/balanced-match/-/balanced-match-1.0.0.tgz#89b4d199ab2bee49de164ea02b89ce462d71b767"
   integrity sha1-ibTRmasr7kneFk6gK4nORi1xt2c=
 
-base64-arraybuffer@0.1.5:
-  version "0.1.5"
-  resolved "https://registry.yarnpkg.com/base64-arraybuffer/-/base64-arraybuffer-0.1.5.tgz#73926771923b5a19747ad666aa5cd4bf9c6e9ce8"
-  integrity sha1-c5JncZI7Whl0etZmqlzUv5xunOg=
-
-base64id@2.0.0:
+base64id@2.0.0, base64id@~2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/base64id/-/base64id-2.0.0.tgz#2770ac6bc47d312af97a8bf9a634342e0cd25cb6"
   integrity sha512-lGe34o6EHj9y3Kts9R4ZYs/Gr+6N7MCaMlIFA3F1R2O5/m7K06AxfSeO5530PEERE6/WyEg3lsuyw4GHlPZHog==
 
-better-assert@~1.0.0:
-  version "1.0.2"
-  resolved "https://registry.yarnpkg.com/better-assert/-/better-assert-1.0.2.tgz#40866b9e1b9e0b55b481894311e68faffaebc522"
-  integrity sha1-QIZrnhueC1W0gYlDEeaPr/rrxSI=
-  dependencies:
-    callsite "1.0.0"
-
 binary-extensions@^2.0.0:
   version "2.2.0"
   resolved "https://registry.yarnpkg.com/binary-extensions/-/binary-extensions-2.2.0.tgz#75f502eeaf9ffde42fc98829645be4ea76bd9e2d"
   integrity sha512-jDctJ/IVQbZoJykoeHbhXpOlNBqGNcwXJKJog42E5HDPUwQTSdjCHdihjj0DlnheQ7blbT6dHOafNAiS8ooQKA==
 
-blob@0.0.5:
-  version "0.0.5"
-  resolved "https://registry.yarnpkg.com/blob/-/blob-0.0.5.tgz#d680eeef25f8cd91ad533f5b01eed48e64caf683"
-  integrity sha512-gaqbzQPqOoamawKg0LGVd7SzLgXS+JH61oWprSLH+P+abTczqJbhTR8CmJ2u9/bUYNmHTGJx/UEmn6doAvvuig==
-
 body-parser@1.19.0:
   version "1.19.0"
   resolved "https://registry.yarnpkg.com/body-parser/-/body-parser-1.19.0.tgz#96b2709e57c9c4e09a6fd66a8fd979844f69f08a"
@@ -418,11 +396,6 @@ bytes@3.1.0:
   resolved "https://registry.yarnpkg.com/bytes/-/bytes-3.1.0.tgz#f6cf7933a360e0588fa9fde85651cdc7f805d1f6"
   integrity sha512-zauLjrfCG+xvoyaqLoV8bLVXXNGC4JqlxFCutSDWA6fJrTo2ZuvLYTqZ7aHBLZSMOopbzwv8f+wZcVzfVTI2Dg==
 
-callsite@1.0.0:
-  version "1.0.0"
-  resolved "https://registry.yarnpkg.com/callsite/-/callsite-1.0.0.tgz#280398e5d664bd74038b6f0905153e6e8af1bc20"
-  integrity sha1-KAOY5dZkvXQDi28JBRU+borxvCA=
-
 callsites@^3.0.0:
   version "3.1.0"
   resolved "https://registry.yarnpkg.com/callsites/-/callsites-3.1.0.tgz#b3630abd8943432f54b3f0519238e33cd7df2f73"
@@ -484,21 +457,6 @@ color-name@~1.1.4:
   resolved "https://registry.yarnpkg.com/color-name/-/color-name-1.1.4.tgz#c2a09a87acbde69543de6f63fa3995c826c536a2"
   integrity sha512-dOy+3AuW3a2wNbZHIuMZpTcgjGuLU/uBL/ubcZF9OXbDo8ff4O8yVp5Bf0efS8uEoYo5q4Fx7dY9OgQGXgAsQA==
 
-component-bind@1.0.0:
-  version "1.0.0"
-  resolved "https://registry.yarnpkg.com/component-bind/-/component-bind-1.0.0.tgz#00c608ab7dcd93897c0009651b1d3a8e1e73bbd1"
-  integrity sha1-AMYIq33Nk4l8AAllGx06jh5zu9E=
-
-component-emitter@1.2.1:
-  version "1.2.1"
-  resolved "https://registry.yarnpkg.com/component-emitter/-/component-emitter-1.2.1.tgz#137918d6d78283f7df7a6b7c5a63e140e69425e6"
-  integrity sha1-E3kY1teCg/ffemt8WmPhQOaUJeY=
-
-component-inherit@0.0.3:
-  version "0.0.3"
-  resolved "https://registry.yarnpkg.com/component-inherit/-/component-inherit-0.0.3.tgz#645fc4adf58b72b649d5cae65135619db26ff143"
-  integrity sha1-ZF/ErfWLcrZJ1crmUTVhnbJv8UM=
-
 concat-map@0.0.1:
   version "0.0.1"
   resolved "https://registry.yarnpkg.com/concat-map/-/concat-map-0.0.1.tgz#d8a96bd77fd68df7793a73036a3ba0d5405d477b"
@@ -521,16 +479,24 @@ cookie-signature@1.0.6:
   resolved "https://registry.yarnpkg.com/cookie-signature/-/cookie-signature-1.0.6.tgz#e303a882b342cc3ee8ca513a79999734dab3ae2c"
   integrity sha1-4wOogrNCzD7oylE6eZmXNNqzriw=
 
-cookie@0.3.1:
-  version "0.3.1"
-  resolved "https://registry.yarnpkg.com/cookie/-/cookie-0.3.1.tgz#e7e0a1f9ef43b4c8ba925c5c5a96e806d16873bb"
-  integrity sha1-5+Ch+e9DtMi6klxcWpboBtFoc7s=
-
 cookie@0.4.0:
   version "0.4.0"
   resolved "https://registry.yarnpkg.com/cookie/-/cookie-0.4.0.tgz#beb437e7022b3b6d49019d088665303ebe9c14ba"
   integrity sha512-+Hp8fLp57wnUSt0tY0tHEXh4voZRDnoIrZPqlo3DPiI4y9lwg/jqx+1Om94/W6ZaPDOUbnjOt/99w66zk+l1Xg==
 
+cookie@~0.4.1:
+  version "0.4.2"
+  resolved "https://registry.yarnpkg.com/cookie/-/cookie-0.4.2.tgz#0e41f24de5ecf317947c82fc789e06a884824432"
+  integrity sha512-aSWTXFzaKWkvHO1Ny/s+ePFpvKsPnjc551iI41v3ny/ow6tBG5Vd+FuqGNhh1LxOmVzOlGUriIlOaokOvhaStA==
+
+cors@~2.8.5:
+  version "2.8.5"
+  resolved "https://registry.yarnpkg.com/cors/-/cors-2.8.5.tgz#eac11da51592dd86b9f06f6e7ac293b3df875d29"
+  integrity sha512-KIHbLJqu73RGr/hnbrO9uBeixNGuvSQjul/jdFvS/KFSIH1hWVd1ng7zOHx+YrEfInLG7q4n6GHQ9cDtxv/P6g==
+  dependencies:
+    object-assign "^4"
+    vary "^1"
+
 create-require@^1.1.0:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/create-require/-/create-require-1.1.1.tgz#c1d7e8f1e5f6cfc9ff65f9cd352d37348756c333"
@@ -566,19 +532,12 @@ debug@4.3.1, debug@^4.0.1, debug@^4.1.1:
   dependencies:
     ms "2.1.2"
 
-debug@~3.1.0:
-  version "3.1.0"
-  resolved "https://registry.yarnpkg.com/debug/-/debug-3.1.0.tgz#5bb5a0672628b64149566ba16819e61518c67261"
-  integrity sha512-OX8XqP7/1a9cqkxYw2yXss15f26NKWBpDXQd0/uK/KPqdQhxbPa994hnzjcE2VqQpDslf55723cKPUOGSmMY3g==
+debug@~4.3.1, debug@~4.3.2:
+  version "4.3.4"
+  resolved "https://registry.yarnpkg.com/debug/-/debug-4.3.4.tgz#1319f6579357f2338d3337d2cdd4914bb5dcc865"
+  integrity sha512-PRWFHuSU3eDtQJPvnNY7Jcket1j0t5OuOsFzPPzsekD52Zl8qUfFIPEiswXqIvHWGVHOgX+7G/vCNNhehwxfkQ==
   dependencies:
-    ms "2.0.0"
-
-debug@~4.1.0:
-  version "4.1.1"
-  resolved "https://registry.yarnpkg.com/debug/-/debug-4.1.1.tgz#3b72260255109c6b589cee050f1d516139664791"
-  integrity sha512-pYAIzeRo8J6KPEaJ0VWOh5Pzkbw/RetuzehGM7QRRX5he4fPHx2rdKMB256ehJCkX+XRQm16eZLqLNS8RSZXZw==
-  dependencies:
-    ms "^2.1.1"
+    ms "2.1.2"
 
 deep-is@^0.1.3:
   version "0.1.3"
@@ -641,45 +600,26 @@ encodeurl@~1.0.2:
   resolved "https://registry.yarnpkg.com/encodeurl/-/encodeurl-1.0.2.tgz#ad3ff4c86ec2d029322f5a02c3a9a606c95b3f59"
   integrity sha1-rT/0yG7C0CkyL1oCw6mmBslbP1k=
 
-engine.io-client@~3.4.0:
-  version "3.4.0"
-  resolved "https://registry.yarnpkg.com/engine.io-client/-/engine.io-client-3.4.0.tgz#82a642b42862a9b3f7a188f41776b2deab643700"
-  integrity sha512-a4J5QO2k99CM2a0b12IznnyQndoEvtA4UAldhGzKqnHf42I3Qs2W5SPnDvatZRcMaNZs4IevVicBPayxYt6FwA==
-  dependencies:
-    component-emitter "1.2.1"
-    component-inherit "0.0.3"
-    debug "~4.1.0"
-    engine.io-parser "~2.2.0"
-    has-cors "1.1.0"
-    indexof "0.0.1"
-    parseqs "0.0.5"
-    parseuri "0.0.5"
-    ws "~6.1.0"
-    xmlhttprequest-ssl "~1.5.4"
-    yeast "0.1.2"
+engine.io-parser@~5.0.3:
+  version "5.0.6"
+  resolved "https://registry.yarnpkg.com/engine.io-parser/-/engine.io-parser-5.0.6.tgz#7811244af173e157295dec9b2718dfe42a64ef45"
+  integrity sha512-tjuoZDMAdEhVnSFleYPCtdL2GXwVTGtNjoeJd9IhIG3C1xs9uwxqRNEu5WpnDZCaozwVlK/nuQhpodhXSIMaxw==
 
-engine.io-parser@~2.2.0:
-  version "2.2.0"
-  resolved "https://registry.yarnpkg.com/engine.io-parser/-/engine.io-parser-2.2.0.tgz#312c4894f57d52a02b420868da7b5c1c84af80ed"
-  integrity sha512-6I3qD9iUxotsC5HEMuuGsKA0cXerGz+4uGcXQEkfBidgKf0amsjrrtwcbwK/nzpZBxclXlV7gGl9dgWvu4LF6w==
-  dependencies:
-    after "0.8.2"
-    arraybuffer.slice "~0.0.7"
-    base64-arraybuffer "0.1.5"
-    blob "0.0.5"
-    has-binary2 "~1.0.2"
-
-engine.io@~3.4.0:
-  version "3.4.0"
-  resolved "https://registry.yarnpkg.com/engine.io/-/engine.io-3.4.0.tgz#3a962cc4535928c252759a00f98519cb46c53ff3"
-  integrity sha512-XCyYVWzcHnK5cMz7G4VTu2W7zJS7SM1QkcelghyIk/FmobWBtXE7fwhBusEKvCSqc3bMh8fNFMlUkCKTFRxH2w==
+engine.io@~6.4.1:
+  version "6.4.2"
+  resolved "https://registry.yarnpkg.com/engine.io/-/engine.io-6.4.2.tgz#ffeaf68f69b1364b0286badddf15ff633476473f"
+  integrity sha512-FKn/3oMiJjrOEOeUub2WCox6JhxBXq/Zn3fZOMCBxKnNYtsdKjxhl7yR3fZhM9PV+rdE75SU5SYMc+2PGzo+Tg==
   dependencies:
+    "@types/cookie" "^0.4.1"
+    "@types/cors" "^2.8.12"
+    "@types/node" ">=10.0.0"
     accepts "~1.3.4"
     base64id "2.0.0"
-    cookie "0.3.1"
-    debug "~4.1.0"
-    engine.io-parser "~2.2.0"
-    ws "^7.1.2"
+    cookie "~0.4.1"
+    cors "~2.8.5"
+    debug "~4.3.1"
+    engine.io-parser "~5.0.3"
+    ws "~8.11.0"
 
 enquirer@^2.3.5:
   version "2.3.6"
@@ -1009,18 +949,6 @@ globby@^11.0.1:
     merge2 "^1.3.0"
     slash "^3.0.0"
 
-has-binary2@~1.0.2:
-  version "1.0.3"
-  resolved "https://registry.yarnpkg.com/has-binary2/-/has-binary2-1.0.3.tgz#7776ac627f3ea77250cfc332dab7ddf5e4f5d11d"
-  integrity sha512-G1LWKhDSvhGeAQ8mPVQlqNcOB2sJdwATtZKl2pDKKHfpf/rYj24lkinxf69blJbnsvtqqNU+L3SL50vzZhXOnw==
-  dependencies:
-    isarray "2.0.1"
-
-has-cors@1.1.0:
-  version "1.1.0"
-  resolved "https://registry.yarnpkg.com/has-cors/-/has-cors-1.1.0.tgz#5e474793f7ea9843d1bb99c23eef49ff126fff39"
-  integrity sha1-XkdHk/fqmEPRu5nCPu9J/xJv/zk=
-
 has-flag@^3.0.0:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/has-flag/-/has-flag-3.0.0.tgz#b5d454dc2199ae225699f3467e5a07f3b955bafd"
@@ -1090,11 +1018,6 @@ imurmurhash@^0.1.4:
   resolved "https://registry.yarnpkg.com/imurmurhash/-/imurmurhash-0.1.4.tgz#9218b9b2b928a238b13dc4fb6b6d576f231453ea"
   integrity sha1-khi5srkoojixPcT7a21XbyMUU+o=
 
-indexof@0.0.1:
-  version "0.0.1"
-  resolved "https://registry.yarnpkg.com/indexof/-/indexof-0.0.1.tgz#82dc336d232b9062179d05ab3293a66059fd435d"
-  integrity sha1-gtwzbSMrkGIXnQWrMpOmYFn9Q10=
-
 inflight@^1.0.4:
   version "1.0.6"
   resolved "https://registry.yarnpkg.com/inflight/-/inflight-1.0.6.tgz#49bd6331d7d02d0c09bc910a1075ba8165b56df9"
@@ -1154,11 +1077,6 @@ is-number@^7.0.0:
   resolved "https://registry.yarnpkg.com/is-number/-/is-number-7.0.0.tgz#7535345b896734d5f80c4d06c50955527a14f12b"
   integrity sha512-41Cifkg6e8TylSpdtTpeLVMqvSBEVzTttHvERD741+pnZ8ANv0004MRL43QKPDlK9cGvNp6NZWZUBlbGXYxxng==
 
-isarray@2.0.1:
-  version "2.0.1"
-  resolved "https://registry.yarnpkg.com/isarray/-/isarray-2.0.1.tgz#a37d94ed9cda2d59865c9f76fe596ee1f338741e"
-  integrity sha1-o32U7ZzaLVmGXJ92/llu4fM4dB4=
-
 isexe@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/isexe/-/isexe-2.0.0.tgz#e8fbf374dc556ff8947a10dcb0572d633f2cfa10"
@@ -1289,7 +1207,7 @@ ms@2.1.1:
   resolved "https://registry.yarnpkg.com/ms/-/ms-2.1.1.tgz#30a5864eb3ebb0a66f2ebe6d727af06a09d86e0a"
   integrity sha512-tgp+dl5cGk28utYktBsrFqA7HKgrhgPsg6Z/EfhWI4gl1Hwq8B/GmY/0oXZ6nF8hDVesS/FpnYaD/kOWhYQvyg==
 
-ms@2.1.2, ms@^2.1.1:
+ms@2.1.2:
   version "2.1.2"
   resolved "https://registry.yarnpkg.com/ms/-/ms-2.1.2.tgz#d09d1f357b443f493382a8eb3ccd183872ae6009"
   integrity sha512-sGkPx+VjMtmA6MX27oA4FBFELFCZZ4S4XqeGOXCv68tT+jb3vk/RyaKWP0PTKyWtmLSM0b+adUTEvbs1PEaH2w==
@@ -1309,10 +1227,10 @@ normalize-path@^3.0.0, normalize-path@~3.0.0:
   resolved "https://registry.yarnpkg.com/normalize-path/-/normalize-path-3.0.0.tgz#0dcd69ff23a1c9b11fd0978316644a0388216a65"
   integrity sha512-6eZs5Ls3WtCisHWp9S2GUy8dqkpGi4BVSz3GaqiE6ezub0512ESztXUwUB6C6IKbQkY2Pnb/mD4WYojCRwcwLA==
 
-object-component@0.0.3:
-  version "0.0.3"
-  resolved "https://registry.yarnpkg.com/object-component/-/object-component-0.0.3.tgz#f0c69aa50efc95b866c186f400a33769cb2f1291"
-  integrity sha1-8MaapQ78lbhmwYb0AKM3acsvEpE=
+object-assign@^4:
+  version "4.1.1"
+  resolved "https://registry.yarnpkg.com/object-assign/-/object-assign-4.1.1.tgz#2109adc7965887cfc05cbbd442cac8bfbb360863"
+  integrity sha512-rJgTQnkUnH1sFw8yT6VSU3zD3sWmu6sZhIseY8VX+GRu3P6F7Fu+JNDoXfklElbLJSnc3FUQHVe4cU5hj+BcUg==
 
 on-finished@~2.3.0:
   version "2.3.0"
@@ -1347,20 +1265,6 @@ parent-module@^1.0.0:
   dependencies:
     callsites "^3.0.0"
 
-parseqs@0.0.5:
-  version "0.0.5"
-  resolved "https://registry.yarnpkg.com/parseqs/-/parseqs-0.0.5.tgz#d5208a3738e46766e291ba2ea173684921a8b89d"
-  integrity sha1-1SCKNzjkZ2bikbouoXNoSSGouJ0=
-  dependencies:
-    better-assert "~1.0.0"
-
-parseuri@0.0.5:
-  version "0.0.5"
-  resolved "https://registry.yarnpkg.com/parseuri/-/parseuri-0.0.5.tgz#80204a50d4dbb779bfdc6ebe2778d90e4bce320a"
-  integrity sha1-gCBKUNTbt3m/3G6+J3jZDkvOMgo=
-  dependencies:
-    better-assert "~1.0.0"
-
 parseurl@~1.3.3:
   version "1.3.3"
   resolved "https://registry.yarnpkg.com/parseurl/-/parseurl-1.3.3.tgz#9da19e7bee8d12dff0513ed5b76957793bc2e8d4"
@@ -1589,60 +1493,32 @@ slice-ansi@^4.0.0:
     astral-regex "^2.0.0"
     is-fullwidth-code-point "^3.0.0"
 
-socket.io-adapter@~1.1.0:
-  version "1.1.2"
-  resolved "https://registry.yarnpkg.com/socket.io-adapter/-/socket.io-adapter-1.1.2.tgz#ab3f0d6f66b8fc7fca3959ab5991f82221789be9"
-  integrity sha512-WzZRUj1kUjrTIrUKpZLEzFZ1OLj5FwLlAFQs9kuZJzJi5DKdU7FsWc36SNmA8iDOtwBQyT8FkrriRM8vXLYz8g==
-
-socket.io-client@2.3.0:
-  version "2.3.0"
-  resolved "https://registry.yarnpkg.com/socket.io-client/-/socket.io-client-2.3.0.tgz#14d5ba2e00b9bcd145ae443ab96b3f86cbcc1bb4"
-  integrity sha512-cEQQf24gET3rfhxZ2jJ5xzAOo/xhZwK+mOqtGRg5IowZsMgwvHwnf/mCRapAAkadhM26y+iydgwsXGObBB5ZdA==
+socket.io-adapter@~2.5.2:
+  version "2.5.2"
+  resolved "https://registry.yarnpkg.com/socket.io-adapter/-/socket.io-adapter-2.5.2.tgz#5de9477c9182fdc171cd8c8364b9a8894ec75d12"
+  integrity sha512-87C3LO/NOMc+eMcpcxUBebGjkpMDkNBS9tf7KJqcDsmL936EChtVva71Dw2q4tQcuVC+hAUy4an2NO/sYXmwRA==
   dependencies:
-    backo2 "1.0.2"
-    base64-arraybuffer "0.1.5"
-    component-bind "1.0.0"
-    component-emitter "1.2.1"
-    debug "~4.1.0"
-    engine.io-client "~3.4.0"
-    has-binary2 "~1.0.2"
-    has-cors "1.1.0"
-    indexof "0.0.1"
-    object-component "0.0.3"
-    parseqs "0.0.5"
-    parseuri "0.0.5"
-    socket.io-parser "~3.3.0"
-    to-array "0.1.4"
+    ws "~8.11.0"
 
-socket.io-parser@~3.3.0:
-  version "3.3.0"
-  resolved "https://registry.yarnpkg.com/socket.io-parser/-/socket.io-parser-3.3.0.tgz#2b52a96a509fdf31440ba40fed6094c7d4f1262f"
-  integrity sha512-hczmV6bDgdaEbVqhAeVMM/jfUfzuEZHsQg6eOmLgJht6G3mPKMxYm75w2+qhAQZ+4X+1+ATZ+QFKeOZD5riHng==
+socket.io-parser@~4.2.1:
+  version "4.2.2"
+  resolved "https://registry.yarnpkg.com/socket.io-parser/-/socket.io-parser-4.2.2.tgz#1dd384019e25b7a3d374877f492ab34f2ad0d206"
+  integrity sha512-DJtziuKypFkMMHCm2uIshOYC7QaylbtzQwiMYDuCKy3OPkjLzu4B2vAhTlqipRHHzrI0NJeBAizTK7X+6m1jVw==
   dependencies:
-    component-emitter "1.2.1"
-    debug "~3.1.0"
-    isarray "2.0.1"
+    "@socket.io/component-emitter" "~3.1.0"
+    debug "~4.3.1"
 
-socket.io-parser@~3.4.0:
-  version "3.4.0"
-  resolved "https://registry.yarnpkg.com/socket.io-parser/-/socket.io-parser-3.4.0.tgz#370bb4a151df2f77ce3345ff55a7072cc6e9565a"
-  integrity sha512-/G/VOI+3DBp0+DJKW4KesGnQkQPFmUCbA/oO2QGT6CWxU7hLGWqU3tyuzeSK/dqcyeHsQg1vTe9jiZI8GU9SCQ==
+socket.io@^4.6.1:
+  version "4.6.1"
+  resolved "https://registry.yarnpkg.com/socket.io/-/socket.io-4.6.1.tgz#62ec117e5fce0692fa50498da9347cfb52c3bc70"
+  integrity sha512-KMcaAi4l/8+xEjkRICl6ak8ySoxsYG+gG6/XfRCPJPQ/haCRIJBTL4wIl8YCsmtaBovcAXGLOShyVWQ/FG8GZA==
   dependencies:
-    component-emitter "1.2.1"
-    debug "~4.1.0"
-    isarray "2.0.1"
-
-socket.io@2.3.0:
-  version "2.3.0"
-  resolved "https://registry.yarnpkg.com/socket.io/-/socket.io-2.3.0.tgz#cd762ed6a4faeca59bc1f3e243c0969311eb73fb"
-  integrity sha512-2A892lrj0GcgR/9Qk81EaY2gYhCBxurV0PfmmESO6p27QPrUK1J3zdns+5QPqvUYK2q657nSj0guoIil9+7eFg==
-  dependencies:
-    debug "~4.1.0"
-    engine.io "~3.4.0"
-    has-binary2 "~1.0.2"
-    socket.io-adapter "~1.1.0"
-    socket.io-client "2.3.0"
-    socket.io-parser "~3.4.0"
+    accepts "~1.3.4"
+    base64id "~2.0.0"
+    debug "~4.3.2"
+    engine.io "~6.4.1"
+    socket.io-adapter "~2.5.2"
+    socket.io-parser "~4.2.1"
 
 source-map-support@^0.5.12, source-map-support@^0.5.17:
   version "0.5.19"
@@ -1727,11 +1603,6 @@ text-table@^0.2.0:
   resolved "https://registry.yarnpkg.com/text-table/-/text-table-0.2.0.tgz#7f5ee823ae805207c00af2df4a84ec3fcfa570b4"
   integrity sha1-f17oI66AUgfACvLfSoTsP8+lcLQ=
 
-to-array@0.1.4:
-  version "0.1.4"
-  resolved "https://registry.yarnpkg.com/to-array/-/to-array-0.1.4.tgz#17e6c11f73dd4f3d74cda7a4ff3238e9ad9bf890"
-  integrity sha1-F+bBH3PdTz10zaek/zI46a2b+JA=
-
 to-regex-range@^5.0.1:
   version "5.0.1"
   resolved "https://registry.yarnpkg.com/to-regex-range/-/to-regex-range-5.0.1.tgz#1648c44aae7c8d988a326018ed72f5b4dd0392e4"
@@ -1846,7 +1717,7 @@ v8-compile-cache@^2.0.3:
   resolved "https://registry.yarnpkg.com/v8-compile-cache/-/v8-compile-cache-2.2.0.tgz#9471efa3ef9128d2f7c6a7ca39c4dd6b5055b132"
   integrity sha512-gTpR5XQNKFwOd4clxfnhaqvfqMpqEwr4tOtCyz4MtYZX2JYhfr1JvBFKdS+7K/9rfpZR3VLX+YWBbKoxCgS43Q==
 
-vary@~1.1.2:
+vary@^1, vary@~1.1.2:
   version "1.1.2"
   resolved "https://registry.yarnpkg.com/vary/-/vary-1.1.2.tgz#2299f02c6ded30d4a5961b0b9f74524a18f634fc"
   integrity sha1-IpnwLG3tMNSllhsLn3RSShj2NPw=
@@ -1868,22 +1739,10 @@ wrappy@1:
   resolved "https://registry.yarnpkg.com/wrappy/-/wrappy-1.0.2.tgz#b5243d8f3ec1aa35f1364605bc0d1036e30ab69f"
   integrity sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8=
 
-ws@^7.1.2:
-  version "7.2.3"
-  resolved "https://registry.yarnpkg.com/ws/-/ws-7.2.3.tgz#a5411e1fb04d5ed0efee76d26d5c46d830c39b46"
-  integrity sha512-HTDl9G9hbkNDk98naoR/cHDws7+EyYMOdL1BmjsZXRUjf7d+MficC4B7HLUPlSiho0vg+CWKrGIt/VJBd1xunQ==
-
-ws@~6.1.0:
-  version "6.1.4"
-  resolved "https://registry.yarnpkg.com/ws/-/ws-6.1.4.tgz#5b5c8800afab925e94ccb29d153c8d02c1776ef9"
-  integrity sha512-eqZfL+NE/YQc1/ZynhojeV8q+H050oR8AZ2uIev7RU10svA9ZnJUddHcOUZTJLinZ9yEfdA2kSATS2qZK5fhJA==
-  dependencies:
-    async-limiter "~1.0.0"
-
-xmlhttprequest-ssl@~1.5.4:
-  version "1.5.5"
-  resolved "https://registry.yarnpkg.com/xmlhttprequest-ssl/-/xmlhttprequest-ssl-1.5.5.tgz#c2876b06168aadc40e57d97e81191ac8f4398b3e"
-  integrity sha1-wodrBhaKrcQOV9l+gRkayPQ5iz4=
+ws@~8.11.0:
+  version "8.11.0"
+  resolved "https://registry.yarnpkg.com/ws/-/ws-8.11.0.tgz#6a0d36b8edfd9f96d8b25683db2f8d7de6e8e143"
+  integrity sha512-HPG3wQd9sNQoT9xHyNCXoDUa+Xw/VevmY9FoHyQ+g+rrMn4j6FB4np7Z0OhdTgjx6MgQLK7jwSy1YecU1+4Asg==
 
 xtend@^4.0.0:
   version "4.0.2"
@@ -1895,11 +1754,6 @@ yallist@^4.0.0:
   resolved "https://registry.yarnpkg.com/yallist/-/yallist-4.0.0.tgz#9bb92790d9c0effec63be73519e11a35019a3a72"
   integrity sha512-3wdGidZyq5PB084XLES5TpOSRA3wjXAlIWMhum2kRcv/41Sn2emQ0dycQW4uZXLejwKvg6EsvbdlVL+FYEct7A==
 
-yeast@0.1.2:
-  version "0.1.2"
-  resolved "https://registry.yarnpkg.com/yeast/-/yeast-0.1.2.tgz#008e06d8094320c372dbc2f8ed76a0ca6c8ac419"
-  integrity sha1-AI4G2AlDIMNy28L47XagymyKxBk=
-
 yn@3.1.1:
   version "3.1.1"
   resolved "https://registry.yarnpkg.com/yn/-/yn-3.1.1.tgz#1e87401a09d767c1d5eab26a6e4c185182d2eb50"