diff --git a/README.md b/README.md
index a7c334d..f0153fe 100644
--- a/README.md
+++ b/README.md
@@ -12,7 +12,8 @@ If you don't have YunoHost, please see [here](https://yunohost.org/#/install) to
 own data. A personal cloud which run on your own server. With Nextcloud
 you can synchronize your files over your devices.
 
-**Shipped version:** 15.0.14
+
+**Shipped version:** 18.0.2
 
 ## Screenshots
 
@@ -27,7 +28,7 @@ you can synchronize your files over your devices.
 
 ## Documentation
 
- * Official documentation: https://docs.nextcloud.com/server/15/user_manual/
+ * Official documentation: https://docs.nextcloud.com/server/18/user_manual/
  * YunoHost documentation: https://github.com/YunoHost/doc/blob/master/app_nextcloud_fr.md
 
 ## YunoHost specific features
@@ -49,7 +50,6 @@ this package:
 
 * x86-64b - [![Build Status](https://ci-apps.yunohost.org/ci/logs/nextcloud%20%28Apps%29.svg)](https://ci-apps.yunohost.org/ci/apps/nextcloud/)
 * ARMv8-A - [![Build Status](https://ci-apps-arm.yunohost.org/ci/logs/nextcloud%20%28Apps%29.svg)](https://ci-apps-arm.yunohost.org/ci/apps/nextcloud/)
-* Jessie x86-64b - [![Build Status](https://ci-stretch.nohost.me/ci/logs/nextcloud%20%28Apps%29.svg)](https://ci-stretch.nohost.me/ci/apps/nextcloud/)
 
 ## Limitations
 
diff --git a/check_process b/check_process
index 8b4cff8..afc9dec 100644
--- a/check_process
+++ b/check_process
@@ -12,7 +12,7 @@
 		setup_private=0
 		setup_public=0
 		upgrade=1
-		upgrade=1	from_commit=1cdb9ea1619c6acaaa90bae88b5c4bed5084a2a7
+		upgrade=1	from_commit=9c57c2f78f3da979d587d708eb9379ffaa41bcfa
 		backup_restore=1
 		multi_instance=1
 		incorrect_path=1
@@ -24,6 +24,6 @@
 Email=
 Notification=none
 ;;; Upgrade options
-	; commit=1cdb9ea1619c6acaaa90bae88b5c4bed5084a2a7
-		name= Fix Debian Stretch dependencies by installing php-apcu, php-mbstring … 
+	; commit=9c57c2f78f3da979d587d708eb9379ffaa41bcfa
+		name=Do not use too much process for php (#247)
 		manifest_arg=domain=DOMAIN&path=PATH&admin=USER&user_home=1&
diff --git a/conf/extra_php-fpm.conf b/conf/extra_php-fpm.conf
index b626ca2..4b0d12d 100644
--- a/conf/extra_php-fpm.conf
+++ b/conf/extra_php-fpm.conf
@@ -1,5 +1,7 @@
 
 ; Additional php.ini defines, specific to this pool of workers.
+env[PATH] = $PATH
+php_admin_value[memory_limit] = 512M
 php_value[upload_max_filesize] = 10G
 php_value[post_max_size] = 10G
 php_value[default_charset] = UTF-8
diff --git a/conf/nextcloud.cron b/conf/nextcloud.cron
index 93fde63..3a63ff5 100644
--- a/conf/nextcloud.cron
+++ b/conf/nextcloud.cron
@@ -1 +1 @@
-*/15  *  *  *  * __USER__ /usr/bin/php -f __DESTDIR__/cron.php
+*/15  *  *  *  * __USER__ /usr/bin/php__YNH_PHP_VERSION__ -f __DESTDIR__/cron.php
diff --git a/conf/nginx.conf b/conf/nginx.conf
index ec7954b..8f2b3fb 100644
--- a/conf/nginx.conf
+++ b/conf/nginx.conf
@@ -4,6 +4,18 @@ location = /.well-known/carddav {
 location = /.well-known/caldav {
   return 301 https://$server_name__PATH__/remote.php/dav;
 }
+location = /.well-known/host-meta {
+  return 301 $scheme://$host:$server_port__PATH__/public.php?service=host-meta;
+}
+location = /.well-known/host-meta.json {
+  return 301 $scheme://$host:$server_port__PATH__/public.php?service=host-meta-json;
+}
+location = /.well-known/webfinger {
+  return 301 $scheme://$host:$server_port__PATH__/public.php?service=webfinger;
+}
+location = /.well-known/nodeinfo {
+  return 301 $scheme://$host:$server_port__PATH__/public.php?service=nodeinfo;
+}
 
 #sub_path_only rewrite ^__PATH__$ __PATH__/ permanent;
 location ^~ __PATH__/ {
@@ -41,11 +53,6 @@ location ^~ __PATH__/ {
   error_page 403 __PATH__/core/templates/403.php;
   error_page 404 __PATH__/core/templates/404.php;
 
-  # The following 2 rules are only needed for the user_webfinger app.
-  # Uncomment it if you're planning to use this app.
-  #rewrite ^/.well-known/host-meta __PATH__/public.php?service=host-meta last;
-  #rewrite ^/.well-known/host-meta.json __PATH__/public.php?service=host-meta-json last;
-
   location __PATH__/ {
     rewrite ^ __PATH__/index.php;
   }
@@ -63,26 +70,50 @@ location ^~ __PATH__/ {
     deny all;
   }
 
-  location ~ ^__PATH__/(?:index|remote|public|cron|core/ajax/update|status|ocs/v[12]|updater/.+|ocs-provider/.+|ocm-provider/.+)\.php(/.*|)$ {
-    include fastcgi_params;
-    fastcgi_split_path_info ^(.+\.php)(/.+)$;
+  location ~ ^__PATH__/(?:index|remote|public|cron|core/ajax/update|status|ocs/v[12]|updater/.+|oc[ms]-provider/.+)\.php(/.*|)$ {
+    fastcgi_split_path_info ^(.+?\.php)(/.*|)$;
+    set $path_info $fastcgi_path_info;
     try_files $fastcgi_script_name =404;
+    include fastcgi_params;
+
     fastcgi_param SCRIPT_FILENAME $request_filename;
-    fastcgi_param PATH_INFO $fastcgi_path_info;
+    fastcgi_param PATH_INFO $path_info;
     fastcgi_param HTTPS on;
+    # Avoid sending the security headers twice
     fastcgi_param modHeadersAvailable true;
-    fastcgi_param REMOTE_USER $remote_user;
-    fastcgi_pass unix:/var/run/php/php7.0-fpm-__NAME__.sock;
+    # Enable pretty urls
+    fastcgi_param front_controller_active true;
+    fastcgi_pass unix:/var/run/php/php__YNH_PHP_VERSION__-fpm-__NAME__.sock;
     fastcgi_intercept_errors on;
+    fastcgi_request_buffering off;
+    fastcgi_param REMOTE_USER $remote_user;
   }
 
-  location ~ ^__PATH__/(?:updater|ocs-provider|ocm-provider)(?:$|/) {
+  location ~ ^__PATH__/(?:updater|oc[ms]-provider)(?:$|/) {
     try_files $uri/ =404;
     index index.php;
   }
 
+  location = __PATH__/core/js/oc.js {
+    rewrite ^ __PATH__/index.php$request_uri;
+  }
+
+  location = __PATH__/core/preview.png {
+    rewrite ^ __PATH__/index.php$request_uri;
+  }
+
+  location ~* ^__PATH__/(?:css|js)/ {
+    rewrite ^ __PATH__/index.php$request_uri;
+  }
+
+  location ~* ^__PATH__/apps/theming/img/core/filetypes/ {
+    rewrite ^ __PATH__/index.php$request_uri;
+  }
+
+
+
   # Adding the cache control header for js and css files
-  location ~ ^__PATH__/.+[^/]\.(?:css|js|woff2?|svg|gif)$ {
+  location ~ \.(?:css|js|woff2?|svg|gif)$ {
     try_files $uri __PATH__/index.php$request_uri;
     more_set_headers "Cache-Control: public, max-age=15778463";
     # Add headers to serve security related headers
@@ -98,7 +129,8 @@ location ^~ __PATH__/ {
     access_log off;
   }
 
-  location ~* \.(?:png|html|ttf|ico|jpg|jpeg)$ {
+  location ~* \.(?:png|html|ttf|ico|jpg|jpeg|bcmap)$ {
+    try_files $uri __PATH__/index.php$request_uri;
     # Optional: Don't log access to other assets
     access_log off;
   }
diff --git a/conf/php-fpm.conf b/conf/php-fpm.conf
index 31d62f2..33dcb5e 100644
--- a/conf/php-fpm.conf
+++ b/conf/php-fpm.conf
@@ -33,7 +33,7 @@ group = __USER__
 ;                            (IPv6 and IPv4-mapped) on a specific port;
 ;   '/path/to/unix/socket' - to listen on a unix socket.
 ; Note: This value is mandatory.
-listen = /var/run/php/php7.0-fpm-__NAMETOCHANGE__.sock
+listen = /var/run/php/php__PHPVERSION__-fpm-__NAMETOCHANGE__.sock
 
 ; Set listen(2) backlog.
 ; Default Value: 511 (-1 on FreeBSD and OpenBSD)
@@ -229,7 +229,7 @@ pm.max_spare_servers = 3
 ;   last request memory:  0
 ;
 ; Note: There is a real-time FPM status monitoring sample web page available
-;       It's available in: /usr/share/php/7.0/fpm/status.html
+;       It's available in: /usr/share/php/__PHPVERSION__/fpm/status.html
 ;
 ; Note: The value must start with a leading slash (/). The value can be
 ;       anything, but it may not be a good idea to use the .php extension or it
@@ -430,6 +430,7 @@ env[PATH] = $PATH
 ; php_admin_flag[short_open_tag] = On
 
 ; Additional php.ini defines, specific to this pool of workers.
+php_admin_value[memory_limit] = 512M
 php_value[upload_max_filesize] = 10G
 php_value[post_max_size] = 10G
 php_value[default_charset] = UTF-8
diff --git a/manifest.json b/manifest.json
index 4aaacf5..9976a6e 100644
--- a/manifest.json
+++ b/manifest.json
@@ -6,7 +6,7 @@
         "en": "Access & share your files, calendars, contacts, mail & more from any device, on your terms",
         "fr": "Consultez et partagez vos fichiers, agendas, carnets d'adresses, emails et bien plus depuis les appareils de votre choix, sous vos conditions"
     },
-    "version": "15.0.14~ynh1",
+    "version": "18.0.2~ynh1",
     "url": "https://nextcloud.com",
     "license": "AGPL-3.0",
     "maintainer": {
diff --git a/scripts/_common.sh b/scripts/_common.sh
index 249fb61..7b84705 100644
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -3,7 +3,10 @@
 # COMMON VARIABLES
 #=================================================
 
-pkg_dependencies="php-gd php-json php-intl php-mcrypt php-curl php-apcu php-redis php-ldap php-imagick php-zip php-mbstring php-xml imagemagick acl tar smbclient at"
+pkg_dependencies="imagemagick acl tar smbclient at"
+
+YNH_PHP_VERSION="7.3"
+extra_pkg_dependencies="php${YNH_PHP_VERSION}-bz2 php${YNH_PHP_VERSION}-imap php${YNH_PHP_VERSION}-smbclient php${YNH_PHP_VERSION}-gmp php${YNH_PHP_VERSION}-gd php${YNH_PHP_VERSION}-json php${YNH_PHP_VERSION}-intl php${YNH_PHP_VERSION}-curl php${YNH_PHP_VERSION}-apcu php${YNH_PHP_VERSION}-redis php${YNH_PHP_VERSION}-ldap php${YNH_PHP_VERSION}-imagick php${YNH_PHP_VERSION}-zip php${YNH_PHP_VERSION}-mbstring php${YNH_PHP_VERSION}-xml php${YNH_PHP_VERSION}-mysql php${YNH_PHP_VERSION}-igbinary"
 
 #=================================================
 # EXPERIMENTAL HELPERS
@@ -25,17 +28,19 @@ exec_as() {
 #=================================================
 
 # Check if an URL is already handled
-# usage: is_url_handled URL
+# usage: is_url_handled --domain=DOMAIN --path=PATH_URI
 is_url_handled() {
     # Declare an array to define the options of this helper.
-    declare -Ar args_array=( [u]=url= )
-    local url
+    local legacy_args=dp
+    declare -Ar args_array=( [d]=domain= [p]=path= )
+    local domain
+    local path
     # Manage arguments with getopts
     ynh_handle_getopts_args "$@"
 
     # Try to get the url with curl, and keep the http code and an eventual redirection url.
     local curl_output="$(curl --insecure --silent --output /dev/null \
-      --write-out '%{http_code};%{redirect_url}' "$url")"
+      --write-out '%{http_code};%{redirect_url}' https://127.0.0.1$path --header "Host: $domain" --resolve $domain:443:127.0.0.1)"
 
     # Cut the output and keep only the first part to keep the http code
     local http_code="${curl_output%%;*}"
@@ -329,7 +334,7 @@ ynh_smart_mktemp () {
         elif is_there_enough_space /var; then
                 local tmpdir=/var
         elif is_there_enough_space /; then
-                local tmpdir=/   
+                local tmpdir=/
         elif is_there_enough_space /home; then
                 local tmpdir=/home
         else
@@ -609,3 +614,380 @@ ynh_multimedia_addaccess () {
         groupadd -f multimedia
         usermod -a -G multimedia $user_name
 }
+
+# Install another version of php.
+#
+# usage: ynh_install_php --phpversion=phpversion [--package=packages]
+# | arg: -v, --phpversion - Version of php to install.
+# | arg: -p, --package - Additionnal php packages to install
+ynh_install_php () {
+	# Declare an array to define the options of this helper.
+	local legacy_args=vp
+	declare -Ar args_array=( [v]=phpversion= [p]=package= )
+	local phpversion
+	local package
+	# Manage arguments with getopts
+	ynh_handle_getopts_args "$@"
+	package=${package:-}
+
+	# Store phpversion into the config of this app
+	ynh_app_setting_set $app phpversion $phpversion
+
+	if [ "$phpversion" == "7.0" ]
+	then
+		ynh_die "Do not use ynh_install_php to install php7.0"
+	fi
+
+	# Store the ID of this app and the version of php requested for it
+	echo "$YNH_APP_INSTANCE_NAME:$phpversion" | tee --append "/etc/php/ynh_app_version"
+
+	# Add an extra repository for those packages
+	ynh_install_extra_repo --repo="https://packages.sury.org/php/ $(lsb_release -sc) main" --key="https://packages.sury.org/php/apt.gpg" --priority=995 --name=extra_php_version
+
+	# Install requested dependencies from this extra repository.
+	# Install php-fpm first, otherwise php will install apache as a dependency.
+	ynh_add_app_dependencies --package="php${phpversion}-fpm"
+	ynh_add_app_dependencies --package="php$phpversion php${phpversion}-common $package"
+
+	# Set php7.0 back as the default version for php-cli.
+	update-alternatives --set php /usr/bin/php7.0
+
+	# Pin this extra repository after packages are installed to prevent sury of doing shit
+	ynh_pin_repo --package="*" --pin="origin \"packages.sury.org\"" --priority=200 --name=extra_php_version
+	ynh_pin_repo --package="php7.0*" --pin="origin \"packages.sury.org\"" --priority=600 --name=extra_php_version --append
+
+	# Advertise service in admin panel
+	yunohost service add php${phpversion}-fpm --log "/var/log/php${phpversion}-fpm.log"
+}
+
+# Remove the specific version of php used by the app.
+#
+# usage: ynh_install_php
+ynh_remove_php () {
+	# Get the version of php used by this app
+	local phpversion=$(ynh_app_setting_get $app phpversion)
+
+	if [ "$phpversion" == "7.0" ] || [ -z "$phpversion" ]
+	then
+		if [ "$phpversion" == "7.0" ]
+		then
+			ynh_print_err "Do not use ynh_remove_php to install php7.0"
+		fi
+		return 0
+	fi
+
+	# Remove the line for this app
+	sed --in-place "/$YNH_APP_INSTANCE_NAME:$phpversion/d" "/etc/php/ynh_app_version"
+
+	# If no other app uses this version of php, remove it.
+	if ! grep --quiet "$phpversion" "/etc/php/ynh_app_version"
+	then
+		# Purge php dependences for this version.
+		ynh_package_autopurge "php$phpversion php${phpversion}-fpm php${phpversion}-common"
+		# Remove the service from the admin panel
+		yunohost service remove php${phpversion}-fpm
+	fi
+
+	# If no other app uses alternate php versions, remove the extra repo for php
+	if [ ! -s "/etc/php/ynh_app_version" ]
+	then
+		ynh_secure_remove /etc/php/ynh_app_version
+	fi
+}
+
+#=================================================
+# FUTURE OFFICIAL HELPERS
+#=================================================
+# Pin a repository.
+#
+# usage: ynh_pin_repo --package=packages --pin=pin_filter [--priority=priority_value] [--name=name] [--append]
+# | arg: -p, --package - Packages concerned by the pin. Or all, *.
+# | arg: -i, --pin - Filter for the pin.
+# | arg: -p, --priority - Priority for the pin
+# | arg: -n, --name - Name for the files for this repo, $app as default value.
+# | arg: -a, --append - Do not overwrite existing files.
+#
+# See https://manpages.debian.org/stretch/apt/apt_preferences.5.en.html for information about pinning.
+#
+ynh_pin_repo () {
+	# Declare an array to define the options of this helper.
+	local legacy_args=pirna
+	declare -Ar args_array=( [p]=package= [i]=pin= [r]=priority= [n]=name= [a]=append )
+	local package
+	local pin
+	local priority
+	local name
+	local append
+	# Manage arguments with getopts
+	ynh_handle_getopts_args "$@"
+	package="${package:-*}"
+	priority=${priority:-50}
+	name="${name:-$app}"
+	append=${append:-0}
+
+	if [ $append -eq 1 ]
+	then
+		append="tee -a"
+	else
+		append="tee"
+	fi
+
+	mkdir -p "/etc/apt/preferences.d"
+	echo "Package: $package
+Pin: $pin
+Pin-Priority: $priority
+" \
+	| $append "/etc/apt/preferences.d/$name"
+}
+
+# Add a repository.
+#
+# usage: ynh_add_repo --uri=uri --suite=suite --component=component [--name=name] [--append]
+# | arg: -u, --uri - Uri of the repository.
+# | arg: -s, --suite - Suite of the repository.
+# | arg: -c, --component - Component of the repository.
+# | arg: -n, --name - Name for the files for this repo, $app as default value.
+# | arg: -a, --append - Do not overwrite existing files.
+#
+# Example for a repo like deb http://forge.yunohost.org/debian/ stretch stable
+#                             uri                               suite   component
+# ynh_add_repo --uri=http://forge.yunohost.org/debian/ --suite=stretch --component=stable
+#
+ynh_add_repo () {
+	# Declare an array to define the options of this helper.
+	local legacy_args=uscna
+	declare -Ar args_array=( [u]=uri= [s]=suite= [c]=component= [n]=name= [a]=append )
+	local uri
+	local suite
+	local component
+	local name
+	local append
+	# Manage arguments with getopts
+	ynh_handle_getopts_args "$@"
+	name="${name:-$app}"
+	append=${append:-0}
+
+	if [ $append -eq 1 ]
+	then
+		append="tee -a"
+	else
+		append="tee"
+	fi
+
+	mkdir -p "/etc/apt/sources.list.d"
+	# Add the new repo in sources.list.d
+	echo "deb $uri $suite $component" \
+		| $append "/etc/apt/sources.list.d/$name.list"
+}
+
+# Add an extra repository correctly, pin it and get the key.
+#
+# usage: ynh_install_extra_repo --repo="repo" [--key=key_url] [--priority=priority_value] [--name=name] [--append]
+# | arg: -r, --repo - Complete url of the extra repository.
+# | arg: -k, --key - url to get the public key.
+# | arg: -p, --priority - Priority for the pin
+# | arg: -n, --name - Name for the files for this repo, $app as default value.
+# | arg: -a, --append - Do not overwrite existing files.
+ynh_install_extra_repo () {
+	# Declare an array to define the options of this helper.
+	local legacy_args=rkpna
+	declare -Ar args_array=( [r]=repo= [k]=key= [p]=priority= [n]=name= [a]=append )
+	local repo
+	local key
+	local priority
+	local name
+	local append
+	# Manage arguments with getopts
+	ynh_handle_getopts_args "$@"
+	name="${name:-$app}"
+	append=${append:-0}
+	key=${key:-0}
+	priority=${priority:-}
+
+	if [ $append -eq 1 ]
+	then
+		append="--append"
+		wget_append="tee -a"
+	else
+		append=""
+		wget_append="tee"
+	fi
+
+	# Split the repository into uri, suite and components.
+	# Remove "deb " at the beginning of the repo.
+	repo="${repo#deb }"
+
+	# Get the uri
+	local uri="$(echo "$repo" | awk '{ print $1 }')"
+
+	# Get the suite
+	local suite="$(echo "$repo" | awk '{ print $2 }')"
+
+	# Get the components
+	local component="${repo##$uri $suite }"
+
+	# Add the repository into sources.list.d
+	ynh_add_repo --uri="$uri" --suite="$suite" --component="$component" --name="$name" $append
+
+	# Pin the new repo with the default priority, so it won't be used for upgrades.
+	# Build $pin from the uri without http and any sub path
+	local pin="${uri#*://}"
+	pin="${pin%%/*}"
+	# Set a priority only if asked
+	if [ -n "$priority" ]
+	then
+		priority="--priority=$priority"
+	fi
+	ynh_pin_repo --package="*" --pin="origin \"$pin\"" $priority --name="$name" $append
+
+	# Get the public key for the repo
+	if [ -n "$key" ]
+	then
+		mkdir -p "/etc/apt/trusted.gpg.d"
+		wget -q "$key" -O - | gpg --dearmor | $wget_append /etc/apt/trusted.gpg.d/$name.gpg > /dev/null
+	fi
+
+	# Update the list of package with the new repo
+	ynh_package_update
+}
+
+# Remove an extra repository and the assiociated configuration.
+#
+# usage: ynh_remove_extra_repo [--name=name]
+# | arg: -n, --name - Name for the files for this repo, $app as default value.
+ynh_remove_extra_repo () {
+	# Declare an array to define the options of this helper.
+	local legacy_args=n
+	declare -Ar args_array=( [n]=name= )
+	local name
+	# Manage arguments with getopts
+	ynh_handle_getopts_args "$@"
+	name="${name:-$app}"
+
+	ynh_secure_remove "/etc/apt/sources.list.d/$name.list"
+	ynh_secure_remove "/etc/apt/preferences.d/$name"
+	ynh_secure_remove "/etc/apt/trusted.gpg.d/$name.gpg"
+	ynh_secure_remove "/etc/apt/trusted.gpg.d/$name.asc"
+
+	# Update the list of package to exclude the old repo
+	ynh_package_update
+}
+
+# Install packages from an extra repository properly.
+#
+# usage: ynh_install_extra_app_dependencies --repo="repo" --package="dep1 dep2" [--key=key_url] [--name=name]
+# | arg: -r, --repo - Complete url of the extra repository.
+# | arg: -p, --package - The packages to install from this extra repository
+# | arg: -k, --key - url to get the public key.
+# | arg: -n, --name - Name for the files for this repo, $app as default value.
+ynh_install_extra_app_dependencies () {
+	# Declare an array to define the options of this helper.
+	local legacy_args=rpkn
+	declare -Ar args_array=( [r]=repo= [p]=package= [k]=key= [n]=name= )
+	local repo
+	local package
+	local key
+	local name
+	# Manage arguments with getopts
+	ynh_handle_getopts_args "$@"
+	name="${name:-$app}"
+	key=${key:-0}
+
+	# Set a key only if asked
+	if [ -n "$key" ]
+	then
+		key="--key=$key"
+	fi
+	# Add an extra repository for those packages
+	ynh_install_extra_repo --repo="$repo" $key --priority=995 --name=$name
+
+	# Install requested dependencies from this extra repository.
+	ynh_add_app_dependencies --package="$package"
+
+	# Remove this extra repository after packages are installed
+	ynh_remove_extra_repo --name=$app
+}
+
+#=================================================
+
+# patched version of ynh_install_app_dependencies to be used with ynh_add_app_dependencies
+
+# Define and install dependencies with a equivs control file
+# This helper can/should only be called once per app
+#
+# usage: ynh_install_app_dependencies dep [dep [...]]
+# | arg: dep - the package name to install in dependence
+#   You can give a choice between some package with this syntax : "dep1|dep2"
+#   Example : ynh_install_app_dependencies dep1 dep2 "dep3|dep4|dep5"
+#   This mean in the dependence tree : dep1 & dep2 & (dep3 | dep4 | dep5)
+#
+# Requires YunoHost version 2.6.4 or higher.
+ynh_install_app_dependencies () {
+    local dependencies=$@
+    dependencies="$(echo "$dependencies" | sed 's/\([^\<=\>]\)\ \([^(]\)/\1, \2/g')"
+    dependencies=${dependencies//|/ | }
+    local manifest_path="../manifest.json"
+    if [ ! -e "$manifest_path" ]; then
+    	manifest_path="../settings/manifest.json"	# Into the restore script, the manifest is not at the same place
+    fi
+
+    local version=$(grep '\"version\": ' "$manifest_path" | cut -d '"' -f 4)	# Retrieve the version number in the manifest file.
+    if [ ${#version} -eq 0 ]; then
+        version="1.0"
+    fi
+    local dep_app=${app//_/-}	# Replace all '_' by '-'
+
+    # Handle specific versions
+    if [[ "$dependencies" =~ [\<=\>] ]]
+    then
+        # Replace version specifications by relationships syntax
+        # https://www.debian.org/doc/debian-policy/ch-relationships.html
+        # Sed clarification
+        # [^(\<=\>] ignore if it begins by ( or < = >. To not apply twice.
+        # [\<=\>] matches < = or >
+        # \+ matches one or more occurence of the previous characters, for >= or >>.
+        # [^,]\+ matches all characters except ','
+        # Ex: package>=1.0 will be replaced by package (>= 1.0)
+        dependencies="$(echo "$dependencies" | sed 's/\([^(\<=\>]\)\([\<=\>]\+\)\([^,]\+\)/\1 (\2 \3)/g')"
+    fi
+
+    cat > /tmp/${dep_app}-ynh-deps.control << EOF	# Make a control file for equivs-build
+Section: misc
+Priority: optional
+Package: ${dep_app}-ynh-deps
+Version: ${version}
+Depends: ${dependencies}
+Architecture: all
+Description: Fake package for $app (YunoHost app) dependencies
+ This meta-package is only responsible of installing its dependencies.
+EOF
+    ynh_package_install_from_equivs /tmp/${dep_app}-ynh-deps.control \
+        || ynh_die --message="Unable to install dependencies"	# Install the fake package and its dependencies
+    rm /tmp/${dep_app}-ynh-deps.control
+    ynh_app_setting_set --app=$app --key=apt_dependencies --value="$dependencies"
+}
+
+ynh_add_app_dependencies () {
+	# Declare an array to define the options of this helper.
+	local legacy_args=pr
+	declare -Ar args_array=( [p]=package= [r]=replace)
+	local package
+	local replace
+	# Manage arguments with getopts
+	ynh_handle_getopts_args "$@"
+	replace=${replace:-0}
+
+	local current_dependencies=""
+	if [ $replace -eq 0 ]
+	then
+		local dep_app=${app//_/-}	# Replace all '_' by '-'
+		if ynh_package_is_installed --package="${dep_app}-ynh-deps"
+		then
+			current_dependencies="$(dpkg-query --show --showformat='${Depends}' ${dep_app}-ynh-deps) "
+		fi
+
+		current_dependencies=${current_dependencies// | /|}
+	fi
+
+	ynh_install_app_dependencies "${current_dependencies}${package}"
+}
diff --git a/scripts/_ynh_add_fpm_config b/scripts/_ynh_add_fpm_config
index 9d4dacf..487c044 100644
--- a/scripts/_ynh_add_fpm_config
+++ b/scripts/_ynh_add_fpm_config
@@ -43,7 +43,7 @@ ynh_add_fpm_config () {
     fi
 
 	# Configure PHP-FPM 7.0 by default
-	phpversion="${phpversion:-7.0}"
+	phpversion="${phpversion:-$YNH_PHP_VERSION}"
 
 	local fpm_config_dir="/etc/php/$phpversion/fpm"
 	local fpm_service="php${phpversion}-fpm"
@@ -75,7 +75,7 @@ ynh_add_fpm_config () {
 
         # Replace standard variables into the default file
         ynh_replace_string --match_string="^\[www\]" --replace_string="[$app]" --target_file="$finalphpconf"
-        ynh_replace_string --match_string=".*listen = .*" --replace_string="listen = /var/run/php/php7.0-fpm-$app.sock" --target_file="$finalphpconf"
+        ynh_replace_string --match_string=".*listen = .*" --replace_string="listen = /var/run/php/php$phpversion-fpm-$app.sock" --target_file="$finalphpconf"
         ynh_replace_string --match_string="^user = .*" --replace_string="user = $app" --target_file="$finalphpconf"
         ynh_replace_string --match_string="^group = .*" --replace_string="group = $app" --target_file="$finalphpconf"
         ynh_replace_string --match_string=".*chdir = .*" --replace_string="chdir = $final_path" --target_file="$finalphpconf"
@@ -125,4 +125,22 @@ ynh_add_fpm_config () {
 		ynh_store_file_checksum "$finalphpini"
 	fi
 	ynh_systemd_action --service_name=$fpm_service --action=reload
+	
+	# Clean other php version config files for this app. Used for migration purpose.
+	if [ -e "/etc/php5/fpm/pool.d/$app.conf" ]
+	then
+		ynh_secure_remove --file="/etc/php5/fpm/pool.d/$app.conf"
+		ynh_systemd_action --service_name=php5-fpm --action=reload
+	fi
+	for i in `seq 0 4`
+	do
+		if [ "$phpversion" != "7.$i" ]
+		then
+			if [ -e "/etc/php/7.$i/fpm/pool.d/$app.conf" ]
+			then
+				ynh_secure_remove --file="/etc/php/7.$i/fpm/pool.d/$app.conf"
+				ynh_systemd_action --service_name=php7.$i-fpm --action=reload
+			fi
+		fi
+	done
 }
diff --git a/scripts/backup b/scripts/backup
index 5dbc43c..68ae4ee 100755
--- a/scripts/backup
+++ b/scripts/backup
@@ -48,7 +48,7 @@ ynh_backup --src_path="/etc/nginx/conf.d/$domain.d/$app.conf"
 #=================================================
 ynh_script_progression --message="Backing up php-fpm configuration..."
 
-ynh_backup --src_path="/etc/php/7.0/fpm/pool.d/$app.conf"
+ynh_backup --src_path="/etc/php/$YNH_PHP_VERSION/fpm/pool.d/$app.conf"
 
 #=================================================
 # BACKUP THE MYSQL DATABASE
diff --git a/scripts/change_url b/scripts/change_url
index 83bcb4e..c9f7a9c 100644
--- a/scripts/change_url
+++ b/scripts/change_url
@@ -63,7 +63,7 @@ then
 	domain="$old_domain"
 	path_url="$new_path"
 	# Create a dedicated nginx config
-	ynh_add_nginx_config
+	ynh_add_nginx_config YNH_PHP_VERSION
 fi
 
 # Change the domain for nginx
@@ -84,7 +84,7 @@ ynh_script_progression --message="Applying Nextcloud specific modifications..."
 # Define a function to execute commands with `occ`
 exec_occ() {
   (cd "$final_path" && exec_as "$app" \
-      php occ --no-interaction --no-ansi "$@")
+      php${YNH_PHP_VERSION} occ --no-interaction --no-ansi "$@")
 }
 
 if [ $change_domain -eq 1 ]
@@ -99,7 +99,7 @@ fi
 if [ $change_domain -eq 1 ]
 then
 	# Check if .well-known is available for this domain
-	if is_url_handled --url="https://$domain/.well-known/caldav" || is_url_handled --url="https://$domain/.well-known/carddav"
+	if is_url_handled --domain="$domain" --path="/.well-known/caldav" || is_url_handled --domain="$domain" --path="/.well-known/carddav"
 	then
 		ynh_print_warn --message="Another app already uses the domain $domain to serve a caldav/carddav feature. You may encounter issues when dealing with your calendar or address book."
 
diff --git a/scripts/install b/scripts/install
index 377e82d..5c80e56 100755
--- a/scripts/install
+++ b/scripts/install
@@ -58,6 +58,8 @@ ynh_script_progression --message="Installing dependencies..." --weight=60
 
 ynh_install_app_dependencies $pkg_dependencies
 
+ynh_install_php --phpversion="$YNH_PHP_VERSION" --package="$extra_pkg_dependencies"
+
 #=================================================
 # CREATE A MYSQL DATABASE
 #=================================================
@@ -91,7 +93,7 @@ ynh_setup_source --dest_dir="$final_path"
 ynh_script_progression --message="Configuring nginx web server..." --weight=2
 
 # Check if .well-known is available for this domain
-if is_url_handled --url="https://$domain/.well-known/caldav" || is_url_handled --url="https://$domain/.well-known/carddav"
+if is_url_handled --domain="$domain" --path="/.well-known/caldav" || is_url_handled --domain="$domain" --path="/.well-known/carddav"
 then
     ynh_print_warn --message="Another app already uses the domain $domain to serve a caldav/carddav feature. You may encounter issues when dealing with your calendar or address book."
 
@@ -100,7 +102,7 @@ then
 fi
 
 # Create a dedicated nginx config
-ynh_add_nginx_config
+ynh_add_nginx_config YNH_PHP_VERSION
 
 #=================================================
 # CREATE DEDICATED USER
@@ -137,7 +139,7 @@ ynh_script_progression --message="Installing nextcloud..." --weight=30
 # Define a function to execute commands with `occ`
 exec_occ() {
   (cd "$final_path" && exec_as "$app" \
-      php occ --no-interaction --no-ansi "$@")
+      php$YNH_PHP_VERSION occ --no-interaction --no-ansi "$@")
 }
 
 # Set write access for the following commands
@@ -266,6 +268,7 @@ chmod 644 "$cron_path"
 
 ynh_replace_string --match_string="__USER__" --replace_string="$app" --target_file="$cron_path"
 ynh_replace_string --match_string="__DESTDIR__" --replace_string="$final_path" --target_file="$cron_path"
+ynh_replace_string --match_string="__YNH_PHP_VERSION__" --replace_string="$YNH_PHP_VERSION" --target_file="$cron_path"
 
 exec_occ background:cron
 
@@ -273,7 +276,7 @@ exec_occ background:cron
 # POST-INSTALL MAINTENANCE
 #=================================================
 
-(cd /tmp ; at now + 10 minutes <<< "(cd $final_path ; sudo -u $app php occ db:add-missing-indices ; sudo -u $app php occ db:convert-filecache-bigint -n) > /tmp/${app}_maintenance.log")
+(cd /tmp ; at now + 10 minutes <<< "(cd $final_path ; sudo -u $app php${YNH_PHP_VERSION} occ db:add-missing-indices ; sudo -u $app php${YNH_PHP_VERSION} occ db:convert-filecache-bigint -n) > /tmp/${app}_maintenance.log")
 
 #=================================================
 # CONFIGURE THE HOOK FILE FOR USER CREATE
diff --git a/scripts/restore b/scripts/restore
index c6c8e7e..c62be63 100755
--- a/scripts/restore
+++ b/scripts/restore
@@ -8,6 +8,7 @@
 
 source ../settings/scripts/_common.sh
 source /usr/share/yunohost/helpers
+source _ynh_add_fpm_config
 
 #=================================================
 # MANAGE SCRIPT FAILURE
@@ -47,7 +48,7 @@ test ! -d $final_path \
 ynh_restore_file --origin_path="/etc/nginx/conf.d/$domain.d/$app.conf"
 
 # Check if .well-known is available for this domain
-if is_url_handled --url="https://$domain/.well-known/caldav" || is_url_handled --url="https://$domain/.well-known/carddav"
+if is_url_handled --domain="$domain" --path="/.well-known/caldav" || is_url_handled --domain="$domain" --path="/.well-known/carddav"
 then
     ynh_print_warn --message="Another app already uses the domain $domain to serve a caldav/carddav feature. You may encounter issues when dealing with your calendar or address book."
 
@@ -83,7 +84,7 @@ ynh_system_user_create --username=$app
 # RESTORE THE PHP-FPM CONFIGURATION
 #=================================================
 
-ynh_restore_file --origin_path="/etc/php/7.0/fpm/pool.d/$app.conf"
+ynh_restore_file --origin_path="/etc/php/$YNH_PHP_VERSION/fpm/pool.d/$app.conf"
 
 #=================================================
 # SPECIFIC RESTORATION
@@ -95,6 +96,8 @@ ynh_script_progression --message="Reinstalling dependencies..." --weight=60
 # Define and install dependencies
 ynh_install_app_dependencies $pkg_dependencies
 
+ynh_install_php --phpversion="$YNH_PHP_VERSION" --package="$extra_pkg_dependencies"
+
 #=================================================
 # RESTORE THE CRON FILE
 #=================================================
@@ -169,7 +172,7 @@ ynh_systemd_action --action=restart --service_name=fail2ban
 #=================================================
 ynh_script_progression --message="Reloading nginx web server and php-fpm..."
 
-ynh_systemd_action --service_name=php7.0-fpm --action=reload
+ynh_systemd_action --service_name=php${YNH_PHP_VERSION}-fpm --action=reload
 ynh_systemd_action --service_name=nginx --action=reload
 
 #=================================================
diff --git a/scripts/upgrade b/scripts/upgrade
index c436f71..bcc8182 100755
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -132,6 +132,15 @@ fi
 # Normalize the URL path syntax
 path_url=$(ynh_normalize_url_path --path_url=$path_url)
 
+#=================================================
+# UPGRADE DEPENDENCIES
+#=================================================
+ynh_script_progression --message="Upgrading dependencies..." --weight=7
+
+ynh_install_app_dependencies $pkg_dependencies
+
+ynh_install_php --phpversion="$YNH_PHP_VERSION" --package="$extra_pkg_dependencies"
+
 #=================================================
 # STANDARD UPGRADE STEPS
 #=================================================
@@ -142,11 +151,11 @@ ynh_script_progression --message="Upgrading nginx web server configuration..." -
 ynh_backup_if_checksum_is_different --file="/etc/nginx/conf.d/$domain.d/$app.conf"
 
 # Delete current nginx configuration to be able to check if .well-known is already served.
-ynh_remove_nginx_config
+ynh_remove_nginx_config $YNH_PHP_VERSION
 ynh_app_setting_delete --app=$app --key="checksum__etc_nginx_conf.d_$domain.d_$app.conf"
 
 # Check if .well-known is available for this domain
-if is_url_handled --url="https://$domain/.well-known/caldav" || is_url_handled --url="https://$domain/.well-known/carddav"
+if is_url_handled --domain="$domain" --path="/.well-known/caldav" || is_url_handled --domain="$domain" --path="/.well-known/carddav"
 then
     ynh_print_warn --message="Another app already uses the domain $domain to serve a caldav/carddav feature. You may encounter issues when dealing with your calendar or address book."
 
@@ -155,7 +164,7 @@ then
 fi
 
 # Create a dedicated nginx config
-ynh_add_nginx_config
+ynh_add_nginx_config YNH_PHP_VERSION
 
 #=================================================
 # CREATE DEDICATED USER
@@ -171,20 +180,13 @@ ynh_system_user_create --username=$app
 ynh_script_progression --message="Upgrading php-fpm configuration..." --weight=2
 
 # Create a dedicated php-fpm config
-ynh_add_fpm_config --usage=$fpm_usage --footprint=$fpm_footprint
+ynh_add_fpm_config --phpversion="$YNH_PHP_VERSION" --usage=$fpm_usage --footprint=$fpm_footprint
 
 # Delete existing ini configuration file (backward compatibility)
-if [ -f /etc/php/7.0/fpm/conf.d/20-$app.ini ]; then
-	ynh_secure_remove --file=/etc/php/7.0/fpm/conf.d/20-$app.ini
+if [ -f /etc/php/$YNH_PHP_VERSION/fpm/conf.d/20-$app.ini ]; then
+	ynh_secure_remove --file=/etc/php/$YNH_PHP_VERSION/fpm/conf.d/20-$app.ini
 fi
 
-#=================================================
-# UPGRADE DEPENDENCIES
-#=================================================
-ynh_script_progression --message="Upgrading dependencies..." --weight=7
-
-ynh_install_app_dependencies $pkg_dependencies
-
 #=================================================
 # SPECIFIC UPGRADE
 #=================================================
@@ -195,7 +197,7 @@ ynh_install_app_dependencies $pkg_dependencies
 # Define a function to execute commands with `occ`
 exec_occ() {
 (cd "$final_path" && exec_as "$app" \
-    php occ --no-interaction --no-ansi "$@")
+    php$YNH_PHP_VERSION occ --no-interaction --no-ansi "$@")
 }
 
 # Define a function to add an external storage
@@ -381,6 +383,7 @@ chmod 644 "$cron_path"
 
 ynh_replace_string --match_string="__USER__" --replace_string="$app" --target_file="$cron_path"
 ynh_replace_string --match_string="__DESTDIR__" --replace_string="$final_path" --target_file="$cron_path"
+ynh_replace_string --match_string="__YNH_PHP_VERSION__" --replace_string="$YNH_PHP_VERSION" --target_file="$cron_path"
 
 exec_occ background:cron
 
diff --git a/scripts/upgrade.d/upgrade.15.sh b/scripts/upgrade.d/upgrade.15.sh
new file mode 100644
index 0000000..a8c2c1c
--- /dev/null
+++ b/scripts/upgrade.d/upgrade.15.sh
@@ -0,0 +1,7 @@
+#!/bin/bash
+
+# Last available nextcloud version
+next_version="16.0.0"
+
+# Nextcloud tarball checksum sha256
+nextcloud_source_sha256="4532f7028b1d9bf060f75ac4fbbde52a59ecd9c9155f3178a038d3cf3609402e"
diff --git a/scripts/upgrade.d/upgrade.16.sh b/scripts/upgrade.d/upgrade.16.sh
new file mode 100755
index 0000000..cb0d88a
--- /dev/null
+++ b/scripts/upgrade.d/upgrade.16.sh
@@ -0,0 +1,7 @@
+#!/bin/bash
+
+# Last available nextcloud version
+next_version="17.0.0"
+
+# Nextcloud tarball checksum sha256
+nextcloud_source_sha256="6081421b33ecdb3130b2bfb2293a3f4045aeb0b471ee570e675de3d931a142a6"
diff --git a/scripts/upgrade.d/upgrade.17.sh b/scripts/upgrade.d/upgrade.17.sh
new file mode 100755
index 0000000..35200da
--- /dev/null
+++ b/scripts/upgrade.d/upgrade.17.sh
@@ -0,0 +1,7 @@
+#!/bin/bash
+
+# Last available nextcloud version
+next_version="18.0.0"
+
+# Nextcloud tarball checksum sha256
+nextcloud_source_sha256="194095a5586d84040bc455f77b8aa6c80f9a6a6dd713c9aebdad046713d4267b"
diff --git a/scripts/upgrade.d/upgrade.last.sh b/scripts/upgrade.d/upgrade.last.sh
index b06bacc..24a1692 100755
--- a/scripts/upgrade.d/upgrade.last.sh
+++ b/scripts/upgrade.d/upgrade.last.sh
@@ -1,10 +1,10 @@
 #!/bin/bash
 
 # Last available nextcloud version
-next_version="15.0.14"
+next_version="18.0.2"
 
 # Nextcloud tarball checksum sha256
-nextcloud_source_sha256="6916f3ae828ee481f79a53a722c631be1ee1dc319180492ea8459f526516f2a7"
+nextcloud_source_sha256="d033660923dd27106ec64bff0e3afa2f595bd1b9661b7ea7882a1a33006ecb81"
 
 # This function will only be executed upon applying the last upgrade referenced above
 last_upgrade_operations () {
@@ -12,5 +12,5 @@ last_upgrade_operations () {
   cp -a ../sources/patches_last_version/* ../sources/patches
 
   # Execute post-upgrade operations later on
-  (cd /tmp ; at now + 10 minutes <<< "(cd $final_path ; sudo -u $app php occ db:add-missing-indices ; sudo -u $app php occ db:convert-filecache-bigint -n) > /tmp/${app}_maintenance.log")
+  (cd /tmp ; at now + 10 minutes <<< "(cd $final_path ; sudo -u $app php${YNH_PHP_VERSION} occ db:add-missing-indices ; sudo -u $app php${YNH_PHP_VERSION} occ db:convert-filecache-bigint -n) > /tmp/${app}_maintenance.log")
 }
diff --git a/sources/patches_last_version/app-00-add-logout_url-conf.patch b/sources/patches_last_version/app-00-add-logout_url-conf.patch
index 07a9531..919f2d4 100644
--- a/sources/patches_last_version/app-00-add-logout_url-conf.patch
+++ b/sources/patches_last_version/app-00-add-logout_url-conf.patch
@@ -1,16 +1,21 @@
 diff --git a/core/Controller/LoginController.php b/core/Controller/LoginController.php
-index f83b03bc90..568e20dcd7 100644
+index 13aef8f67a..55d8dbf9d1 100644
 --- a/core/Controller/LoginController.php
 +++ b/core/Controller/LoginController.php
-@@ -130,7 +130,10 @@ class LoginController extends Controller {
+@@ -119,11 +119,12 @@ class LoginController extends Controller {
  		}
  		$this->userSession->logout();
-
--		$response = new RedirectResponse($this->urlGenerator->linkToRouteAbsolute('core.login.showLoginForm'));
+ 
+-		$response = new RedirectResponse($this->urlGenerator->linkToRouteAbsolute(
+-			'core.login.showLoginForm',
+-			['clear' => true] // this param the the code in login.js may be removed when the "Clear-Site-Data" is working in the browsers
 +		$redirectUrl = $this->config->getSystemValue('logout_url',
-+			$this->urlGenerator->linkToRouteAbsolute('core.login.showLoginForm'));
-+
++			$this->urlGenerator->linkToRouteAbsolute(
++				'core.login.showLoginForm',
++				['clear' => true] // this param the the code in login.js may be removed when the "Clear-Site-Data" is working in the browsers)
+ 		));
+-
 +		$response = new RedirectResponse($redirectUrl);
  		$this->session->set('clearingExecutionContexts', '1');
  		$this->session->close();
- 		$response->addHeader('Clear-Site-Data', '"cache", "storage", "executionContexts"');
+