diff --git a/src/main/java/info/istlab/ServerTester/MulticastReceiver.java b/src/main/java/info/istlab/ServerTester/MulticastReceiver.java
index 7a7c5d1..345e1a4 100644
--- a/src/main/java/info/istlab/ServerTester/MulticastReceiver.java
+++ b/src/main/java/info/istlab/ServerTester/MulticastReceiver.java
@@ -59,6 +59,8 @@
     public void stop() {
         socket.close();
         sender.stop();
+        remoteHostsWindow.frame.dispose();
+        remoteHostsWindow = null;
         // thread = null;
     }