diff --git a/backend/requirements.txt b/backend/requirements.txt
index 7623d9f..57b0b9d 100644
--- a/backend/requirements.txt
+++ b/backend/requirements.txt
@@ -1,4 +1,5 @@
 Flask==3.1.0
 flask-cors
+flask-socketio
 dotenv
 requests
\ No newline at end of file
diff --git a/backend/src/app.py b/backend/src/app.py
index 1abebfb..5f2b1f6 100644
--- a/backend/src/app.py
+++ b/backend/src/app.py
@@ -1,6 +1,8 @@
 import dotenv
 from flask import Flask, Response, jsonify, request
+
 from flask_cors import CORS
+from flask_socketio import SocketIO, emit
 
 from .room import Room
 from .song import Song, init_db
@@ -11,6 +13,8 @@ dotenv.load_dotenv()
 
 
 app = Flask(__name__)
+app.config["SECRET_KEY"] = "your_secret_key"
+socketio = SocketIO(app)
 CORS(app)
 
 
@@ -24,6 +28,7 @@ ROOMS: dict[int, Room] = {
         {},
         [],
         [Song(mbid="test", title="<title placeholder>", artist="<artist placeholder>", tags=["Metal"], image_id="img-id", youtube_id="yt-id")],
+        playing_idx=1,
     )
 }  # { room_id: room, ... }
 
@@ -63,13 +68,26 @@ def queue():
 
 
 @app.post("/api/queue/next")
-def queue_next(): ...
+def queue_next():
+    if (room_id := request.args.get("room")) is None:
+        return error("Missing room id")
 
+    if (room := ROOMS.get(int(room_id))) is None:
+        return error("Invalid room")
 
-@app.post("/api/queue/renew")
-def queue_renew(): ...
+    room.playing_idx += 1
+
+    if room.playing_idx >= len(room.playing):
+        ## queue ended
+
+        # room.renew_queue()
+        emit("update_songs", {"songs": [1, 2, 3]}, broadcast=True, namespace="/")
+
+        return {"success": True, "ended": True, "index": room.playing_idx, "queue": []}
+
+    return {"success": True, "ended": False, "index": room.playing_idx}
 
 
 init_db()
 if __name__ == "__main__":
-    app.run(debug=True)
+    socketio.run(app, debug=True)
diff --git a/backend/src/room.py b/backend/src/room.py
index e6ebd4b..a5e38a8 100644
--- a/backend/src/room.py
+++ b/backend/src/room.py
@@ -24,6 +24,7 @@ class Room:
     songs: dict[str, UserScoredSong]  # canzoni + voto
     history: list[Song]  # canzoni riprodotte (in ordine)
     playing: list[Song]  # canzoni che sono i riproduzione
+    playing_idx: int
 
     def rank_song(self, song: Song, user_score: int) -> float:
         rank = 0.0