diff --git a/README.md b/README.md
index cec8b46..69a8e04 100644
--- a/README.md
+++ b/README.md
@@ -13,4 +13,14 @@
 
 the script will connect to ice.uplinkcorp.net #theSignal and interface with the serial device.
 
-*note* the permissions might need to be changed to 666 or alternativly script run as root.
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+*note* 
+
+the permissions might need to be changed to 666 or alternativly script run as root.
+
+```
+sudo chmod u+s /usr/bin/screen
+sudo chmod 755 /var/run/screen
+```
+(thanks to SkarDude)
+
+the device cannot be busy when running this script, i.e. kill your screen sessions!
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