diff --git a/backend/src/app.py b/backend/src/app.py
index c11cf37..946f38f 100644
--- a/backend/src/app.py
+++ b/backend/src/app.py
@@ -11,6 +11,7 @@ from .room import Room
 from .song import Song, init_db, get_song_by_title_artist, add_song_in_db, get_song_by_uuid
 from .song_fetch import query_search, yt_get_audio_url, yt_search_song
 from .qrcode_gen import generate_qr
+from .gps import is_within_range
 
 
 dotenv.load_dotenv()
@@ -74,6 +75,7 @@ def on_leave(data):
 def join():
     room_id = request.args.get("room")
     code = request.args.get("code")
+    user_location = request.args.get("location")
 
     if room_id is None:
         return error("Missing room id")
@@ -84,6 +86,9 @@ def join():
     if room.pin is not None and room.pin != code:
         return error("Invalid code")
 
+    if is_within_range(user_location, room.coord, room.range_size) is False:
+        return error("You are not within the room range")
+
     return {"success": True, "ws": f"/ws/{room_id}"}