diff --git a/CHANGELOG b/CHANGELOG
index ae4abe179940ee2cc2e07520ed83666ade73f4dd..d632db3ff0a40aa0ff972c8184eac66d6865ab3e 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,21 @@
+## Centreon 2.5.0
+
+Features
+========
+#4176: ACL on configuration objects
+#4678: UI notification and sound alerts
+#3768: Advanced features on SNMP traps handling
+#4666: Possibility to execute a command upon restart of monitoring engine
+#1728: SSO authentication
+#1845: Additive inheritance is handled on host and service templates
+#4997: Service groups can be linked to service templates
+
+Enhancements
+============
+#4507: Code refactoring
+#4662: Downtime duration can now be expressed in minutes
+#3768: UI - new draggable dynamic input fields
+
 ## Centreon 2.4.5
 
 Enhancements
diff --git a/INSTALL b/INSTALL
deleted file mode 100644
index ed37a6d550af6d3a10ade7a988ebd20ecd3f8a7a..0000000000000000000000000000000000000000
--- a/INSTALL
+++ /dev/null
@@ -1,98 +0,0 @@
-To use graphical plugins, you need to have on your server :
-
-- RRDTOOL
-- perl/RRDTOOL (RRDs.pm)
-- Net::SNMP
-
-To use Centreon, you need to have on your server :
-
-- php5
-- php-mysql
-- php-pear
-- php-snmp
-- php-posix
-- php-ldap (if you would like to use LDAP authentification)
-- gd-devel
-- libpng
-- perl-config-IniFiles
-- perl-Crypt-DES
-- perl-Digest-HMAC
-- perl-Digest-SHA1
-- perl-GD
-- perl-IO-Socket-INET6
-- perl-Net-SNMP
-- perl-rrdtool
-- perl-Socket6
-
----------------------------------------------------------------------------------------------------
-FRANCAIS :
-----------
-
-Pour installer Centreon sans mise � jour :
-
-	Lancer la commande "bash install.sh -i "
-
-Pour mettre � jour Centreon ( > 2.0) :
-
-	Lancer "bash install.sh -u /repertoire/etc/centreon"
-	
-	Avec en argument le r�pertoire o� se trouve 
-	vos fichiers "instCent*.conf"
-
-    Pour la mise � jour de la version 2.0.X vers 2.1.X, il faut donner les droits 
-    � l'utilisateur centreon au niveau de MySQL pour qu'il puisse effectuer des 
-    changements de schemas. Pour cela, lancer la commande suivante :
-	
-	prenons "nagios" comme nom de la base NDO.
-	
-	mysql> GRANT ALTER ON nagios.* to 'centreon'@'localhost';  FLUSH PRIVILEGES;
-
-Pour installer en utilisant un template pr�-defini :
-
-	Lancer "bash install.sh -f tmpl/vardistrib/mon_template"
-
-	Par d�faut, il existe des templates d�j� configur� dans
-	tmpl/vardistrib. Ces fichiers vous permettrons de lancer 
-	l'installation avec une majorit� de variables pr�-d�finis.
-	Le fichier tmpl/vardistrib/sample.tmpl pourra �tre utilis�
-	pour votre configuration.
-
-L'installeur accepte aussi l'option "-v" qui permet d'activer certains
-messages suppl�mentaires � destination du fichier de log. 
-Par d�faut, le fichier de log se trouve dans le r�petoire du m�me nom
-� la base des sources.
-
----------------------------------------------------------------------------------------------------
-ENGLISH :
----------
-
-For install only :
-
-	Launch "./install.sh"
-
-For update Centreon ( > 2.0) :
-
-	Launch "bash install.sh -u /directory/etc/centreon"
-	
-	-u argument is the directy where you can find configuration
-	files "instCent*.conf".
-	
-	For updating centreon 2.0.X to 2.1.X, please give Centreon MySQL user right for 
-	modifying database schema. In order give access, launch the following commande line :
-	
-	Here "nagios" is the name of NDO Database.
-	
-	mysql> GRANT ALTER ON nagios.* to 'centreon'@'localhost';  FLUSH PRIVILEGES;
-
----------------------------------------------------------------------------------------------------
-
-For more information :
-
-- mail infos@centreon.com
-- visit Centreon Website http://www.centreon.com
-- visit Centreon forge http://forge.centreon.com
-- visit Centreon forum http://forum.centreon.com
-- visit Centreon Wiki http://doc.centreon.com
-
-Thanks for using Centreon.
-
diff --git a/README b/README
index 4eb9e16946dea0b8ac79d8d962ece1e5dccd7133..7659cf588884bdc6489b1435bca5b540934809ff 100644
--- a/README
+++ b/README
@@ -1,31 +1,36 @@
-Upgrade from 2.1.x
-=====================
-After Web upgrade
----------------------
-Make sure to restart centstorage, hosts and/or services which contain unicode characters were renamed
-# /etc/init.d/centstorage restart
-
-Upgrade from 2.0.x
-=====================
-Before Web upgrade
----------------------
-As MySQL root user, grant some additional privileges to user Centreon user
-#~> mysql -u root [-p]
-#mysql~> GRANT ALTER ON ndo.* TO 'centreon'@'localhost';
-(ndo database, centreon user and host names could differ depending on your settings)
-
-After Web upgrade
----------------------
-1) 	Modify the logs retention period in Centreon interface : Administration > Options > Centstorage > Options > Logs retention duration
-	The retention duration must cover the oldest nagios log archive file in the folder nagios/var/archives/
-
-2) 	then execute the following command lines in Centreon directory :
-	# ./bin/logAnalyser -a
-	# ./cron/archiveDayLog -r
-
-3) reset the logs retention period to the previous value
-
-
-More
-=====================
-Read "INSTALL" for more information.
\ No newline at end of file
+===============================================================================
+                                   License
+===============================================================================
+Centreon is brought to you under GPLv2. For more infomation regarding this 
+license, read the LICENSE file or visit the following URL:
+* http://www.gnu.org/licenses/old-licenses/gpl-2.0.en.html
+
+
+===============================================================================
+                                 Installation
+===============================================================================
+Please note that Centreon can be installed from the sources or from our RPM 
+packages. Either way, make sure to read our installation documentation:
+* http://documentation.centreon.com/docs/centreon/en/latest/
+
+
+===============================================================================
+                                Official links
+===============================================================================
+Below is a list of official links that may be useful to you:
+* Official website: http://www.centreon.com
+* Bug tracker: http://forge.centreon.com/projects/centreon
+* Forum: http://forum.centreon.com
+* Documentation: http://documentation.centreon.com
+
+
+===============================================================================
+                                   Contact
+===============================================================================
+You can contact us at the following e-mail address:
+* contact@centreon.com
+
+You can also follow us on Twitter:
+* https://twitter.com/Centreon
+
+Thank you for choosing Centreon.