diff --git a/README.md b/README.md
index d399697..302ef46 100644
--- a/README.md
+++ b/README.md
@@ -76,7 +76,9 @@ $ sudo apt-get -y install miniupnpc
 $ upnpc -r 4001 tcp
 ```
 
-> Your IGD (router/GW) must support UPnP for this to work.
+> Your IGD (router/GW) must support UPnP for this to work.  
+> You can delete the port published via UPnP by running ``upnpc -d 4001 tcp``
+> and list them ``upnpc -l``.
 
 After that you should see lots of traffic is coming to your port 4001/tcp: