diff --git a/INSTALL_DEBIAN_4.0.txt b/INSTALL_DEBIAN_4.0.txt
index 3e9ec963d372b1efe816be65dda5150000f2d151..b2aa7be5891c26c0919b9f9c38fe647a606415e4 100644
--- a/INSTALL_DEBIAN_4.0.txt
+++ b/INSTALL_DEBIAN_4.0.txt
@@ -3,9 +3,9 @@ Installation
 
 It is recommended to use a clean (fresh) Debian etch install where you just selected "Standard System" as the package selection during setup. Then follow the steps below to setup your server with ISPConfig 3:
 
-1) Install Postfix, Courier, Saslauthd, MySQL, phpMyAdmin with the following command line (on one line!):
+1) Install Postfix, Courier, Saslauthd, MySQL, phpMyAdmin, ntpdate, rkhunter with the following command line (on one line!):
 
-apt-get install postfix postfix-mysql postfix-doc mysql-client mysql-server courier-authdaemon courier-authlib-mysql courier-pop courier-pop-ssl courier-imap courier-imap-ssl libsasl2 libsasl2-modules libsasl2-modules-sql sasl2-bin libpam-mysql openssl courier-maildrop getmail4
+apt-get install postfix postfix-mysql postfix-doc mysql-client mysql-server courier-authdaemon courier-authlib-mysql courier-pop courier-pop-ssl courier-imap courier-imap-ssl libsasl2 libsasl2-modules libsasl2-modules-sql sasl2-bin libpam-mysql openssl courier-maildrop getmail4 ntp ntpdate rkhunter
 
 Answer the questions from the package manager as follows.
 
diff --git a/INSTALL_DEBIAN_LENNY.txt b/INSTALL_DEBIAN_LENNY.txt
index 4ace08d132e893c5fda6fee0ec74f21d2833ac01..dec1c0fe5ddab10b22a5fda4517d12b0ac74d3b7 100644
--- a/INSTALL_DEBIAN_LENNY.txt
+++ b/INSTALL_DEBIAN_LENNY.txt
@@ -3,9 +3,9 @@ Installation
 
 It is recommended to use a clean (fresh) Debian etch install where you just selected "Standard System" as the package selection during setup. Then follow the steps below to setup your server with ISPConfig 3:
 
-1) Install Postfix, Courier, Saslauthd, MySQL, phpMyAdmin with the following command line (on one line!):
+1) Install Postfix, Courier, Saslauthd, MySQL, phpMyAdmin, ntpdate, rkhunter with the following command line (on one line!):
 
-apt-get install postfix postfix-mysql postfix-doc mysql-client mysql-server courier-authdaemon courier-authlib-mysql courier-pop courier-pop-ssl courier-imap courier-imap-ssl libsasl2 libsasl2-modules libsasl2-modules-sql sasl2-bin libpam-mysql openssl courier-maildrop getmail4
+apt-get install postfix postfix-mysql postfix-doc mysql-client mysql-server courier-authdaemon courier-authlib-mysql courier-pop courier-pop-ssl courier-imap courier-imap-ssl libsasl2 libsasl2-modules libsasl2-modules-sql sasl2-bin libpam-mysql openssl courier-maildrop getmail4 ntp ntpdate rkhunter
 
 Answer the questions from the package manager as follows.