diff --git a/README.md b/README.md
index b7a0ae2..c8ea437 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,12 @@ Copilot for FlightGear
 ## Description 
 This skill acts as an copilot for flight gear that assists you by following your voice commands.
 
-This skill is still under development and not useable yet.
+This skill is still under development.
+
+## Requirements
+FlightGear version 2018.1 or above.
+FlightGear is started with the `--allow-nasal-from-sockets` command line option.
+FlightGear needs to be started with telnet (port 8081 is used as default in the settings) `--telnet=8081`.
 
 ## Examples 
 * "flaps 3"