diff --git a/conf/config.php.in b/conf/config.php.in
new file mode 100644
index 0000000..ee7b65a
--- /dev/null
+++ b/conf/config.php.in
@@ -0,0 +1,93 @@
+<?php
+/**
+ * @package Dotclear
+ *
+ * @copyright Olivier Meunier & Association Dotclear
+ * @copyright GPL-2.0-only
+ */
+
+if (!defined('DC_RC_PATH')) {return;}
+
+// Database driver (mysql (deprecated, disabled in PHP7), mysqli, mysqlimb4 (full UTF-8), pgsql, sqlite)
+define('DC_DBDRIVER', 'mysqli');
+
+// Database hostname (usually "localhost")
+define('DC_DBHOST', 'localhost');
+
+// Database user
+define('DC_DBUSER', '__DB_USER__');
+
+// Database password
+define('DC_DBPASSWORD', '__DB_PASSWORD__');
+
+// Database name
+define('DC_DBNAME', '__DB_NAME__');
+
+// Tables' prefix
+define('DC_DBPREFIX', 'dc_');
+
+// Persistent database connection
+define('DC_DBPERSIST', false);
+
+// Crypt key (password storage)
+define('DC_MASTER_KEY', '__MASTER_KEY__');
+
+// Admin URL. You need to set it for some features.
+define('DC_ADMIN_URL', 'https://__DOMAIN____ADMIN_URL__');
+
+// Admin mail from address. For password recovery and such.
+define('DC_ADMIN_MAILFROM', '__EMAIL__');
+
+// Cookie's name
+define('DC_SESSION_NAME', 'dcxd');
+
+// Session TTL
+//define('DC_SESSION_TTL','120 seconds');
+
+// Plugins root
+define('DC_PLUGINS_ROOT', dirname(__FILE__) . '/../plugins');
+
+// Template cache directory
+define('DC_TPL_CACHE', path::real(dirname(__FILE__) . '/..') . '/cache');
+
+// Var directory
+define('DC_VAR', path::real(dirname(__FILE__) . '/..') . '/var');
+
+// Cryptographic algorithm
+define('DC_CRYPT_ALGO', 'sha512');
+
+// Vendor name
+//define('DC_VENDOR_NAME', 'Dotclear');
+
+// Do not check for update
+//define('DC_NOT_UPDATE', false);
+
+// Update URL
+//define('DC_UPDATE_URL','https://download.dotclear.org/versions.xml');
+
+// Update channel (stable, unstable, testing)
+//define('DC_UPDATE_VERSION', 'stable');
+
+// Proxy config
+//define('HTTP_PROXY_HOST','127.0.0.1');
+//define('HTTP_PROXY_PORT','8080');
+
+// Reverse Proxy
+//define('DC_REVERSE_PROXY',false);
+
+// Show hidden media dirs
+//define('DC_SHOW_HIDDEN_DIRS', false);
+
+// If you have PATH_INFO issue, uncomment following lines
+//if (!isset($_SERVER['ORIG_PATH_INFO'])) {
+//    $_SERVER['ORIG_PATH_INFO'] = '';
+//}
+//$_SERVER['PATH_INFO'] = $_SERVER['ORIG_PATH_INFO'];
+
+// If you have mail problems, uncomment following lines and adapt it to your hosting configuration
+// For more information about this setting, please refer to http://doc.dotclear.net/2.0/admin/install/custom-sendmail
+//function _mail($to, $subject, $message, $headers)
+//{
+//    socketMail::$smtp_relay = 'my.smtp.relay.org';
+//    socketMail::mail($to, $subject, $message, $headers);
+//}
diff --git a/manifest.json b/manifest.json
index 3b0e5eb..aa0dcfd 100644
--- a/manifest.json
+++ b/manifest.json
@@ -14,7 +14,7 @@
         "email": "pierre@kayou.io"
     },
     "requirements": {
-        "yunohost": ">= 3.7.1"
+        "yunohost": ">= 4.2.0"
     },
     "multi_instance": true,
     "services": [
diff --git a/scripts/_common.sh b/scripts/_common.sh
index 944a65e..d7614e9 100644
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -4,6 +4,8 @@
 # COMMON VARIABLES
 #=================================================
 
+YNH_PHP_VERSION="7.3"
+
 #=================================================
 # PERSONAL HELPERS
 #=================================================
diff --git a/scripts/install b/scripts/install
index a143271..3899bf4 100755
--- a/scripts/install
+++ b/scripts/install
@@ -113,25 +113,15 @@ php_config=$final_path/inc/config.php
 master_key=$(ynh_string_random --length=30)
 ynh_app_setting_set --app=$app --key=master_key --value=$master_key
 
-cp $php_config.in $php_config
-
 admin_url="${path_url%/}/admin/index.php"
-
+file=__FILE__
 email=$(ynh_user_get_info --username=$admin --key=mail)
 
 # Config as if we called in admin/install/wizard.php
-ynh_replace_string --match_string="'DC_DBDRIVER', ''" --replace_string="'DC_DBDRIVER', 'mysqli'" --target_file=$php_config
-ynh_replace_string --match_string="'DC_DBHOST', ''" --replace_string="'DC_DBHOST', 'localhost'" --target_file=$php_config
-ynh_replace_string --match_string="'DC_DBUSER', ''" --replace_string="'DC_DBUSER', '$db_user'" --target_file=$php_config
-ynh_replace_string --match_string="'DC_DBPASSWORD', ''" --replace_string="'DC_DBPASSWORD', '$db_pwd'" --target_file=$php_config
-ynh_replace_string --match_string="'DC_DBNAME', ''" --replace_string="'DC_DBNAME', '$db_name'" --target_file=$php_config
-ynh_replace_string --match_string="'DC_MASTER_KEY', ''" --replace_string="'DC_MASTER_KEY', '$master_key'" --target_file=$php_config
-ynh_replace_string --match_string="'DC_ADMIN_URL', ''" --replace_string="'DC_ADMIN_URL', 'https://$domain$admin_url'" --target_file=$php_config
-ynh_replace_string --match_string="'DC_ADMIN_MAILFROM', ''" --replace_string="'DC_ADMIN_MAILFROM', '$email'" --target_file=$php_config
+ynh_add_config --template="../conf/config.php.in" --destination="$php_config"
 
 # Adding LDAP login
-cp ../conf/class.auth.ldap.php $final_path/inc/class.auth.ldap.php
-ynh_replace_string --match_string="__APP__" --replace_string="$app" --target_file="$final_path/inc/class.auth.ldap.php"
+ynh_add_config --template="../conf/class.auth.ldap.php" --destination="$final_path/inc/class.auth.ldap.php"
 
 cat << EOF >> $php_config
 
@@ -139,10 +129,8 @@ cat << EOF >> $php_config
 define('DC_AUTH_CLASS','ldapDcAuth');
 EOF
 
-ynh_store_file_checksum --file=$php_config
-
 chmod 400 "$php_config"
-chown $app:$app "$php_config"
+chown $app "$php_config"
 
 #=================================================
 # SETUP APPLICATION WITH CURL
diff --git a/scripts/upgrade b/scripts/upgrade
index e334b50..3889ee0 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -143,27 +143,15 @@ ynh_script_progression --message="Updating a configuration file..."
 
 php_config=$final_path/inc/config.php
 
-ynh_backup_if_checksum_is_different --file=$php_config
-
-cp $php_config.in $php_config
-
 admin_url="${path_url%/}/admin/index.php"
-
+file=__FILE__
 email=$(ynh_user_get_info --username=$admin --key=mail)
 
 # Config as if we called in admin/install/wizard.php
-ynh_replace_string --match_string="'DC_DBDRIVER', ''" --replace_string="'DC_DBDRIVER', 'mysqli'" --target_file=$php_config
-ynh_replace_string --match_string="'DC_DBHOST', ''" --replace_string="'DC_DBHOST', 'localhost'" --target_file=$php_config
-ynh_replace_string --match_string="'DC_DBUSER', ''" --replace_string="'DC_DBUSER', '$db_user'" --target_file=$php_config
-ynh_replace_string --match_string="'DC_DBPASSWORD', ''" --replace_string="'DC_DBPASSWORD', '$db_pwd'" --target_file=$php_config
-ynh_replace_string --match_string="'DC_DBNAME', ''" --replace_string="'DC_DBNAME', '$db_name'" --target_file=$php_config
-ynh_replace_string --match_string="'DC_MASTER_KEY', ''" --replace_string="'DC_MASTER_KEY', '$master_key'" --target_file=$php_config
-ynh_replace_string --match_string="'DC_ADMIN_URL', ''" --replace_string="'DC_ADMIN_URL', 'https://$domain$admin_url'" --target_file=$php_config
-ynh_replace_string --match_string="'DC_ADMIN_MAILFROM', ''" --replace_string="'DC_ADMIN_MAILFROM', '$email'" --target_file=$php_config
+ynh_add_config --template="../conf/config.php.in" --destination="$php_config"
 
 # Adding LDAP login
-cp ../conf/class.auth.ldap.php $final_path/inc/class.auth.ldap.php
-ynh_replace_string "__APP__" "$app" $final_path/inc/class.auth.ldap.php
+ynh_add_config --template="../conf/class.auth.ldap.php" --destination="$final_path/inc/class.auth.ldap.php"
 
 cat << EOF >> $php_config
 
@@ -171,11 +159,8 @@ cat << EOF >> $php_config
 define('DC_AUTH_CLASS','ldapDcAuth');
 EOF
 
-# Recalculate and store the checksum of the file for the next upgrade.
-ynh_store_file_checksum --file=$php_config
-
 chmod 400 "$php_config"
-chown $app:$app "$php_config"
+chown $app "$php_config"
 
 #=================================================
 # UPDATING DATABASE