diff --git a/OBD.NET/OBD.NET.Common/Devices/SerialDevice.cs b/OBD.NET/OBD.NET.Common/Devices/SerialDevice.cs
index 60a4520..362f6fd 100644
--- a/OBD.NET/OBD.NET.Common/Devices/SerialDevice.cs
+++ b/OBD.NET/OBD.NET.Common/Devices/SerialDevice.cs
@@ -236,6 +236,7 @@ public virtual void Dispose()
         {
             _commandQueue.CompleteAdding();
             _commandCancellationToken?.Cancel();
+            _commandFinishedEvent.Set();
             _commandWorkerTask?.Wait();
             Connection?.Dispose();
         }