diff --git a/Pilz.Net/Api/ApiServer.cs b/Pilz.Net/Api/ApiServer.cs
index b98e4d6..425124a 100644
--- a/Pilz.Net/Api/ApiServer.cs
+++ b/Pilz.Net/Api/ApiServer.cs
@@ -80,7 +80,8 @@ public class ApiServer(string apiUrl) : IApiServer
 
     protected void Receive()
     {
-        httpListener?.BeginGetContext(ListenerCallback, null);
+        if (httpListener.IsListening)
+            httpListener?.BeginGetContext(ListenerCallback, null);
     }
 
     protected void ListenerCallback(IAsyncResult result)