diff --git a/README.md b/README.md
index 7b5f8fc..fc4d087 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,8 @@
 # Cloudflare IPWhitelist
 Whitelist CloudFlare's IPs on port 80/443 <br />
-`https://raw.githubusercontent.com/tommytran732/Cloudflare-IPWhitelist/master/cloudflare.sh`
+This script supports Fedora, RHEL, CentOS, Debian,and Ubuntu. <br>
+`curl -sSL https://raw.githubusercontent.com/tommytran732/Cloudflare-IPWhitelist/master/cloudflare.sh | sudo bash`
+
+# Notes
+Before you run the script, makes sure you have not opened port 80/443 to all IPs as it will make this script useless. <br />
+If you run SSHD on a port different from 22, make sure you have it opened or just change the command `ufw allow 22` to your appropriate port.