diff --git a/Dashboard/src/redux/middlewares/serialConnection.ts b/Dashboard/src/redux/middlewares/serialConnection.ts
index 6a9ae39..6b5f032 100644
--- a/Dashboard/src/redux/middlewares/serialConnection.ts
+++ b/Dashboard/src/redux/middlewares/serialConnection.ts
@@ -51,6 +51,9 @@ const serialConnection: Middleware<{}, RootState> = (state) => (next) => (action
   } else if (connectionEnd.match(action)) {
     electron.ipcRenderer.send("asynchronous-message", "yellow");
   } else if (setSerialPort.match(action)) {
+    if (serialPort?.isOpen) {
+      serialPort.close();
+    }
     serialPort = new PortController(action.payload);
   } else if (sendMessage.match(action)) {
     serialPort?.write(action.payload);