diff --git a/docs/content/config/security/ssl.md b/docs/content/config/security/ssl.md
index 905f4f12..126d8e74 100644
--- a/docs/content/config/security/ssl.md
+++ b/docs/content/config/security/ssl.md
@@ -28,9 +28,9 @@ cd /home/ubuntu/docker/letsencrypt
 ```
 
 Now get the certificate (modify ```mail.myserver.tld```) and following the certbot instructions.
-This will need access to port 443 from the internet, adjust your firewall if needed
+This will need access to port 80 from the internet, adjust your firewall if needed
 ```
-docker run --rm -ti -v $PWD/log/:/var/log/letsencrypt/ -v $PWD/etc/:/etc/letsencrypt/ -p 443:443 deliverous/certbot certonly --standalone -d mail.myserver.tld
+docker run --rm -ti -v $PWD/log/:/var/log/letsencrypt/ -v $PWD/etc/:/etc/letsencrypt/ -p 80:80 deliverous/certbot certonly --standalone -d mail.myserver.tld
 ```
 You can now mount /home/ubuntu/docker/letsencrypt/etc/ in /etc/letsencrypt of ```docker-mailserver```