diff --git a/documentation/administrators b/documentation/administrators
index 88e3036..7eae54e 100644
--- a/documentation/administrators
+++ b/documentation/administrators
@@ -38,7 +38,7 @@ at https://gitolite.com/gitolite/list-non-core.html
 
     'ENABLE' => [
         ... existing commands
-        
+
         # Allow to change HEAD reference (default branch) like this:
         # ssh git@host symbolic-ref <repo> HEAD refs/heads/<name>
         'symbolic-ref',
@@ -103,7 +103,7 @@ Lighttpd requires the certificate and private key to be in a single file:
 Add to lighttpd configuration:
 
     $ vim /etc/lighttpd/lighttpd.conf
-    
+
     server.modules += (
         "mod_fastcgi",
         "mod_proxy",
@@ -140,9 +140,9 @@ that will generate a new privkey+cert.pem file and reload lighttpd.
 
     $ vim /etc/cron.weekly/clif-letsencrypt
     $ chmod +x /etc/cron.weekly/clif-letsencrypt
-    
+
     # Content of "clif-letsencrypt"
-    certbot renew
+    certbot renew --webroot -w /var/www/html
     cd /etc/letsencrypt/live/example.org
     cat privkey.pem cert.pem > privkey+cert.pem
     systemctl restart lighttpd
@@ -164,7 +164,7 @@ system user "git"
 3. Create the file /home/git/.forward with the content:
 
     |/home/git/clif/emails.py
-    
+
 This is a sendmail file (also used by postfix) for deciding how incoming messages
 shall be delivered to the the system user. For our purposes, we instruct postfix
 to pipe all the emails for user "git" to our script.