diff --git a/lib/peer.ts b/lib/peer.ts
index 37771bbca..b75b09ea7 100644
--- a/lib/peer.ts
+++ b/lib/peer.ts
@@ -28,6 +28,7 @@ class PeerOptions implements PeerJSOption {
 	config?: any;
 	secure?: boolean;
 	pingInterval?: number;
+	protocol?: string | string[];
 	referrerPolicy?: ReferrerPolicy;
 	logFunction?: (logLevel: LogLevel, ...rest: any[]) => void;
 }
@@ -240,6 +241,7 @@ export class Peer extends EventEmitter<PeerEvents> {
 			this._options.path!,
 			this._options.key!,
 			this._options.pingInterval,
+			this._options.protocol,
 		);
 
 		socket.on(SocketEventType.Message, (data: ServerMessage) => {
diff --git a/lib/socket.ts b/lib/socket.ts
index e47cb5f25..c7d27af92 100644
--- a/lib/socket.ts
+++ b/lib/socket.ts
@@ -22,6 +22,7 @@ export class Socket extends EventEmitter {
 		path: string,
 		key: string,
 		private readonly pingInterval: number = 5000,
+		private readonly protocol: string | string[] | undefined = undefined,
 	) {
 		super();
 
@@ -39,7 +40,7 @@ export class Socket extends EventEmitter {
 			return;
 		}
 
-		this._socket = new WebSocket(wsUrl + "&version=" + version);
+		this._socket = new WebSocket(wsUrl + "&version=" + version, this.protocol);
 		this._disconnected = false;
 
 		this._socket.onmessage = (event) => {