diff --git a/app.py b/app.py
index 001bf46..d2fbc72 100644
--- a/app.py
+++ b/app.py
@@ -4220,7 +4220,7 @@ def debug_socket():
 <html>
 <head>
     <title>Socket Debug</title>
-    <script src="https://cdn.socket.io/4.7.5/socket.io.min.js"></script>
+    <script src="{{ url_for('static_bp.serve_js_lib', filename='socket.io.min.js') }}?v={{ APP_VERSION }}"></script>
     <style>
         body { font-family: monospace; background: #1e1e1e; color: #fff; padding: 20px; }
         #log { height: 400px; overflow-y: scroll; background: #2d2d2d; padding: 15px; border-radius: 8px; margin: 10px 0; white-space: pre-wrap; }
