diff --git a/README.md b/README.md
index 82db278..f843654 100644
--- a/README.md
+++ b/README.md
@@ -26,7 +26,7 @@ Voodoo privacy also makes it very easy to set up a secure VPN gateway on Amazon
 ### Setting up the VPN gateway
 
 * Create a new security group (EC2 Management interface -> Security groups) 
-** Allow traffic to TCP port 500, and UDP ports 450 and 4500. 
+** Allow traffic to TCP port 500, and UDP ports 500 and 4500. 
 ** It might be helpful to add a rule to allow SSH but you dont really need it. I like to limit SSH login from my home/office IP but if you are really brave you can let everyone find your SSH.
 * Change the default value for the three variables `IPSEC_PSK`, `VPN_USER` and `VPN_PASSWORD` at the top of launch script and copy everything into your clipboard.
 * In amazon console Click on Instances -> Launch Instance -> Classic Wizard -> Ubuntu 12.04 -> 1 micro instance.