diff --git a/server/app.py b/server/app.py
index c63e463..d0318cf 100644
--- a/server/app.py
+++ b/server/app.py
@@ -54,6 +54,7 @@ def init_db():
         ts TEXT,
         read INTEGER DEFAULT 0
     )''')
+    c.execute('CREATE INDEX IF NOT EXISTS idx_notifications_user_read ON notifications(user_id, read)')
     c.execute('''CREATE TABLE IF NOT EXISTS mac_batches(
         id INTEGER PRIMARY KEY AUTOINCREMENT,
         mac TEXT,
@@ -6058,4 +6059,4 @@ init_db()
 
 
 if __name__ == '__main__':
-    app.run(host='0.0.0.0', port=int(os.environ.get('PORT', '5000')))
+    app.run(host='0.0.0.0', port=int(os.environ.get('PORT', '5000')), threaded=True)