diff --git a/person_detection/app.py b/person_detection/app.py
index c188163..1cd5bb5 100644
--- a/person_detection/app.py
+++ b/person_detection/app.py
@@ -20,7 +20,7 @@
 @app.route('/')
 def index():
     """Video streaming home page."""
-    return render_template('index.html', devices=[0, 1])
+    return render_template('index.html', devices=[0, 1, 2, 3])
 
 
 def gen(camera):