diff --git a/gain_viz/app.py b/gain_viz/app.py
index 2576850..13b7ca3 100644
--- a/gain_viz/app.py
+++ b/gain_viz/app.py
@@ -221,13 +221,14 @@ def get_gains():
 
 @app.route('/update_params', methods=['POST'])
 def update_params():
-    global sample_rate, window_ms, center_freq, NFFT
+    global sample_rate, window_ms, center_freq, NFFT, tcp_port
     try:
         # Get parameters from form data
         center_freq = request.form.get('center_freq', type=float)
         sample_rate = request.form.get('sample_rate', type=float)
         NFFT = request.form.get('fft_size', type=int)
         window_ms = request.form.get('window_ms', type=float)
+        tcp_port = request.form.get('tcp_port', type=int)
         
         
     
@@ -252,6 +253,7 @@ def save_config():
         'sample_rate': sample_rate,
         'fft_size': NFFT,
         'window_ms': window_ms
+        'tcp_port' : tcp_port
     }
     with open('/opt/gain-viz/config.json', 'w') as f:
         json.dump(config, f)