diff --git a/Dashboard/src/Components/Settings.tsx b/Dashboard/src/Components/Settings.tsx
index b570295..de4a2f3 100644
--- a/Dashboard/src/Components/Settings.tsx
+++ b/Dashboard/src/Components/Settings.tsx
@@ -89,6 +89,7 @@ const Settings: React.FC<Proptypes> = () => {
           onMenuOpen={() => { fetchPorts(); }}
           onChange={(_, option) => { handlePortChange(option); }}
           selectedKey={selector.serialConnection.port}
+          disabled={selector.serialConnection.status.connected}
         />
 
         <DialogFooter>