diff --git a/README.md b/README.md
index 2c99cb4..a2d0940 100644
--- a/README.md
+++ b/README.md
@@ -11,4 +11,4 @@ $EDITOR config
 ```run server (socat required)
 ./bss.sh <PORT>
 ```
-
+run it without argument -> random port selected
diff --git a/bbs.sh b/bbs.sh
index d64fbc4..1168924 100755
--- a/bbs.sh
+++ b/bbs.sh
@@ -1,7 +1,13 @@
 #!/bin/sh
 
-echo "listening for commands on 0.0.0.0:$1"
+if [ ! -n "$1" ]; then
+	port=$(shuf -i 1024-65000 -n 1)
+else
+	port=$1
+fi
 
-socat -v -v TCP-LISTEN:$1,reuseaddr,pktinfo,fork SYSTEM:"./executor.sh"
+echo "listening for commands on 0.0.0.0:$port"
+
+socat -v -v TCP-LISTEN:$port,reuseaddr,pktinfo,fork SYSTEM:"./executor.sh"