diff --git a/CHANGELOG b/CHANGELOG
index 1803166..996dcc6 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,7 +1,13 @@
 **Changelog**
 
-1.8.1 2016-05-30
-- Update to movim 0.9 git2016-05-30
+2.0 2016?
+- Major code improvement thanks to @jeromelebleu, #28 :
+ - Download and update source code using git (fixed HEAD COMMIT though)
+ - Make use of new YunoHost helpers coming with the 2.4 version
+ - Add backup and restore scripts
+ - Redirect to the SSO on logging out
+- YunoHost 2.4 helpers backport if 2.2 detected (_helpers.sh)
+- Update to movim 0.9 git 2016-07-10
 
 1.8 2016-04-15
 - Update to movim 0.9 git2016-04-15
diff --git a/README.md b/README.md
index ba64943..045e808 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,7 @@ Movim is a decentralized social network, written in PHP and HTML5 and based on t
 
 It is recommended to use a "valid" certificate to use Movim, auto-signed is sometimes problematic. You might want to take a look a StartSSL or Let's Encrypt.
 
-Provided Movim version : 0.9 git2016-05-30
+Provided Movim version : 0.9 git2016-07-10
 
 Please read CHANGELOG.
 
diff --git a/manifest.json b/manifest.json
index 47fb235..b72daa1 100644
--- a/manifest.json
+++ b/manifest.json
@@ -17,9 +17,6 @@
         "mysql",
         "metronome"
     ],
-    "requirements": {
-        "yunohost": ">= 2.4.0"
-    },
     "multi_instance": false,
     "arguments": {
         "install" : [
@@ -71,12 +68,12 @@
             },
             {
                 "name": "ssoenabled",
-                "type": "boolean",
                 "ask": {
-                    "en": "Enable SSO support (autologin)?",
-		    "fr": "Activer le support du SSO (connexion auto) ?"
+                    "en": "Enable SSO support (autologin) ?",
+		    "fr": "Activer le support SSO (connexin auto) ?"
                 },
-                "default": true
+                "choices": ["Yes", "No"],
+		"default": "Yes"
             },
 	    {
                 "name": "port",
diff --git a/scripts/_common.sh b/scripts/_common.sh
index cd6c320..0ccb9d5 100644
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -6,7 +6,7 @@
 GIT_REPO="https://github.com/movim/movim"
 
 # Commit to checkout
-HEAD_COMMIT="512523576b03c2c8952305e70681ed31172b9fd2"
+HEAD_COMMIT="8f56192582e83f4b1dbaa00aab8feb55031598e4"
 
 # Source code destination directory
 DESTDIR="/var/www/movim"
diff --git a/scripts/_helpers.sh b/scripts/_helpers.sh
new file mode 100644
index 0000000..b8055d9
--- /dev/null
+++ b/scripts/_helpers.sh
@@ -0,0 +1,78 @@
+#
+# Yunohost helpers
+#
+
+ynh_die() {
+  echo "$1" 1>&2
+  exit "${2:-1}"
+}
+
+ynh_user_exists() {
+    sudo yunohost user info $admin
+}
+
+ynh_system_user_exists() {
+    getent passwd "$1" &>/dev/null
+}
+
+ynh_app_setting_get() {
+    sudo yunohost app setting "$1" "$2"
+}
+
+ynh_app_setting_set() {
+    sudo yunohost app setting "$1" "$2" -v "$3"
+}
+
+ynh_app_setting_delete() {
+    sudo yunohost app setting -d "$1" "$2"
+}
+
+ynh_string_random() {
+    dd if=/dev/urandom bs=1 count=200 2> /dev/null \
+      | tr -c -d '[A-Za-z0-9]' \
+      | sed -n 's/\(.\{'"${1:-24}"'\}\).*/\1/p'
+}
+
+MYSQL_ROOT_PWD_FILE=/etc/yunohost/mysql
+
+ynh_mysql_create_db() {
+    db=$1
+
+    sql="CREATE DATABASE ${db};"
+
+    # grant all privilegies to user
+    if [[ $# -gt 1 ]]; then
+        sql+=" GRANT ALL PRIVILEGES ON ${db}.* TO '${2}'@'localhost'"
+        [[ -n ${3:-} ]] && sql+=" IDENTIFIED BY '${3}'"
+        sql+=" WITH GRANT OPTION;"
+    fi
+
+    ynh_mysql_execute_as_root "$sql"
+}
+
+ynh_mysql_drop_db() {
+    ynh_mysql_execute_as_root "DROP DATABASE ${1};"
+}
+
+ynh_mysql_drop_user() {
+    ynh_mysql_execute_as_root "DROP USER '${1}'@'localhost';"
+}
+
+ynh_mysql_execute_as_root() {
+    ynh_mysql_connect_as "root" "$(sudo cat $MYSQL_ROOT_PWD_FILE)" \
+        "${2:-}" <<< "$1"
+}
+
+ynh_mysql_connect_as() {
+    mysql -u "$1" --password="$2" -B "${3:-}"
+}
+
+
+ynh_package_install() {
+    ynh_apt -o Dpkg::Options::=--force-confdef \
+            -o Dpkg::Options::=--force-confold install $@
+}
+
+ynh_apt() {
+    DEBIAN_FRONTEND=noninteractive sudo apt-get -y -qq $@
+}
diff --git a/scripts/backup b/scripts/backup
index 58a2b2e..04502f6 100644
--- a/scripts/backup
+++ b/scripts/backup
@@ -7,8 +7,16 @@ app="movim"
 db_user=$app
 db_name=$app
 
-# Source YunoHost helpers
-source /usr/share/yunohost/helpers
+# Source local helpers
+source ./_common.sh
+
+# Source YunoHost helpers if exists.
+# If not, source backported helpers from file.
+if [ -d "/usr/share/yunohost/helpers" ]; then
+  source /usr/share/yunohost/helpers
+else
+  source ./_helpers.sh
+fi
 
 # Retrieve app settings
 domain=$(ynh_app_setting_get "$app" domain)
diff --git a/scripts/install b/scripts/install
index d67cb1b..ffd0933 100644
--- a/scripts/install
+++ b/scripts/install
@@ -15,10 +15,17 @@ ssoenabled=$6
 port=$7
 timezone=`cat /etc/timezone`
 
-# Source YunoHost and local helpers
-source /usr/share/yunohost/helpers
+# Source local helpers
 source ./_common.sh
 
+# Source YunoHost helpers if exists.
+# If not, source backported helpers from file.
+if [ -d "/usr/share/yunohost/helpers" ]; then
+  source /usr/share/yunohost/helpers
+else
+  source ./_helpers.sh
+fi
+
 # Check domain/path availability
 sudo yunohost app checkurl "${domain}${path}" -a "$app" \
   || exit 1
@@ -63,8 +70,8 @@ ynh_package_install php5-gd php5-curl php5-imagick php5-cli
 # Download Movim source code
 tmp_path=/tmp/movim-git
 sudo rm -rf "$tmp_path"
-(git clone --quiet "$GIT_REPO" "$tmp_path" \
-   && cd "$tmp_path" && git checkout --quiet "$HEAD_COMMIT") \
+(git clone "$GIT_REPO" "$tmp_path" \
+   && cd "$tmp_path" && git checkout "$HEAD_COMMIT") \
   || ynh_die "Unable to download Movim source code."
 
 # Set database configuration
@@ -89,9 +96,9 @@ sudo chmod 400 "${DESTDIR}/config/db.inc.php"
 
 # Install PHP dependencies using composer
 (curl -sS https://getcomposer.org/installer \
-     | exec_cmd php -- --quiet --install-dir="$DESTDIR" \
+     | exec_cmd php -- --install-dir="$DESTDIR" \
  && exec_cmd php composer.phar config --global discard-changes true \
- && exec_cmd php composer.phar install --quiet --no-interaction) \
+ && exec_cmd php composer.phar install --no-interaction) \
   || ynh_die "Unable to install Movim dependencies."
 
 # Set Movim database and configuration
@@ -106,9 +113,9 @@ sudo sed -i "s@YHDIR@${DESTDIR}@g" ../conf/movim.{service,init}
 sudo sed -i "s@YHPORT@${port}@g" ../conf/movim.{service,init}
 if [ -d /run/systemd/system ]; then
     sudo cp ../conf/movim.service /etc/systemd/system/
-    sudo systemctl --quiet daemon-reload
-    sudo systemctl --quiet enable movim.service
-    sudo systemctl --quiet start movim.service
+    sudo systemctl daemon-reload
+    sudo systemctl enable movim.service
+    sudo systemctl start movim.service
 else
     sudo cp ../conf/movim.init /etc/init.d/movim
     sudo chmod 755 /etc/init.d/movim
@@ -128,7 +135,7 @@ sed -i "s@//ws/@/ws/@g" ../conf/nginx.conf # Avoid duplicate /
 sudo cp ../conf/nginx.conf /etc/nginx/conf.d/$domain.d/movim.conf
 
 # SSOwat configuration
-if [[ "$ssoenabled" = "0" ]]; then
+if [[ "$ssoenabled" = "No" ]]; then
     ynh_app_setting_set "$app" skipped_uris "/"
     exec_cmd php mud.php config --xmppwhitelist="$domain"
 else
diff --git a/scripts/remove b/scripts/remove
index e23178b..a44eba1 100644
--- a/scripts/remove
+++ b/scripts/remove
@@ -2,8 +2,16 @@
 
 app="movim"
 
-# Source YunoHost helpers
-source /usr/share/yunohost/helpers
+# Source local helpers
+source ./_common.sh
+
+# Source YunoHost helpers if exists.
+# If not, source backported helpers from file.
+if [ -d "/usr/share/yunohost/helpers" ]; then
+  source /usr/share/yunohost/helpers
+else
+  source ./_helpers.sh
+fi
 
 # Retrieve app settings
 domain=$(ynh_app_setting_get "$app" domain)
diff --git a/scripts/restore b/scripts/restore
index 7e39d6d..b36261b 100644
--- a/scripts/restore
+++ b/scripts/restore
@@ -7,8 +7,16 @@ app="movim"
 db_name=$app
 db_user=$app
 
-# Source YunoHost helpers
-source /usr/share/yunohost/helpers
+# Source local helpers
+source ./_common.sh
+
+# Source YunoHost helpers if exists.
+# If not, source backported helpers from file.
+if [ -d "/usr/share/yunohost/helpers" ]; then
+  source /usr/share/yunohost/helpers
+else
+  source ./_helpers.sh
+fi
 
 # Retrieve old app settings
 domain=$(ynh_app_setting_get "$app" domain)
diff --git a/scripts/upgrade b/scripts/upgrade
index b78f169..1826d96 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -5,10 +5,17 @@ set -eu
 
 app="movim"
 
-# Source YunoHost and local helpers
-source /usr/share/yunohost/helpers
+# Source local helpers
 source ./_common.sh
 
+# Source YunoHost helpers if exists.
+# If not, source backported helpers from file.
+if [ -d "/usr/share/yunohost/helpers" ]; then
+  source /usr/share/yunohost/helpers
+else
+  source ./_helpers.sh
+fi
+
 # Retrieve app settings
 domain=$(ynh_app_setting_get "$app" domain)
 path=$(ynh_app_setting_get "$app" path)
@@ -28,8 +35,8 @@ if [ ! -d "${DESTDIR}/.git" ]; then
     sudo rm -rf "$tmp_path"
 
     # Download Movim source code
-    (git clone --quiet "$GIT_REPO" "$tmp_path" \
-       && cd "$tmp_path" && git checkout --quiet "$HEAD_COMMIT") \
+    (git clone "$GIT_REPO" "$tmp_path" \
+       && cd "$tmp_path" && git checkout "$HEAD_COMMIT") \
       || ynh_die "Unable to download Movim source code."
     sudo cp "${DESTDIR}/config/db.inc.php" "${tmp_path}/config/db.inc.php"
 
@@ -40,12 +47,12 @@ if [ ! -d "${DESTDIR}/.git" ]; then
 
     # Install composer for PHP dependencies
     curl -sS https://getcomposer.org/installer \
-        | exec_cmd php -- --quiet --install-dir="$DESTDIR"
+        | exec_cmd php -- --install-dir="$DESTDIR"
 fi
 
 # Update Movim source code
-(exec_cmd git fetch --quiet origin \
-   && exec_cmd git reset --quiet --hard "$HEAD_COMMIT") \
+(exec_cmd git fetch origin \
+   && exec_cmd git reset --hard "$HEAD_COMMIT") \
   || ynh_die "Unable to download Movim source code."
 ## FIXME: consider installation in a subpath
 exec_cmd sed -i "s@'/ws/'@'${path%/}/ws/'@g" \
@@ -61,7 +68,7 @@ sudo chmod 400 "${DESTDIR}/config/db.inc.php"
 
 # Update PHP dependencies using composer
 (exec_cmd php composer.phar config --global discard-changes true \
- && exec_cmd php composer.phar install --quiet --no-interaction) \
+ && exec_cmd php composer.phar install --no-interaction) \
   || ynh_die "Unable to update Movim dependencies."
 
 # Upgrade Movim database as needed
@@ -75,16 +82,17 @@ sudo yunohost app clearaccess movim
 # Replace old public_site variable (if exists) by ssoenabled
 if [ ! -z "$public_site" ]; then
     [[ $public_site = "Yes" ]] \
-      && ssoenabled=0 \
-      || ssoenabled=1
+      && ssoenabled="No" \
+      || ssoenabled="Yes"
     ynh_app_setting_delete "$app" public_site
     ynh_app_setting_set "$app" ssoenabled "$ssoenabled"
 fi
 
 # SSOwat configuration
-if [[ "$ssoenabled" =~ ^0|No$ ]]; then
+if [[ "$ssoenabled" = "No" ]]; then
     ynh_app_setting_set "$app" skipped_uris "/"
     exec_cmd php mud.php config --xmppwhitelist=$domain
+    sudo yunohost app ssowatconf
 else
     ynh_app_setting_set "$app" unprotected_uris "/"
     apply_sso_patch
@@ -97,7 +105,7 @@ sudo sed -i "s@YHPORT@${port}@g" ../conf/movim.{service,init}
 if [ -d /run/systemd/system ]; then
     sudo rm -f /lib/systemd/system/movim.service
     sudo cp ../conf/movim.service /etc/systemd/system/
-    sudo systemctl --quiet daemon-reload
+    sudo systemctl daemon-reload
 else
     sudo /etc/init.d/movim stop
     sudo cp ../conf/movim.init /etc/init.d/movim