diff --git a/conf/systemd.service b/conf/systemd.service
index 381aba8..2a61ed8 100644
--- a/conf/systemd.service
+++ b/conf/systemd.service
@@ -6,11 +6,9 @@ After=syslog.target network.target
 Type=simple
 User=__APP__
 Group=__APP__
-ExecStartPre=__NODEJS__
-Environment="PATH=__ENV_PATH__"
 Environment="PORT=__PORT__"
 WorkingDirectory=__FINAL_PATH__
-ExecStart=/opt/node_n/n/versions/node/8/bin/npm start
+ExecStart=__NODE_DIR__/node bin/wwww
 Restart=always
 
 [Install]
diff --git a/scripts/_common.sh b/scripts/_common.sh
index b14c456..df0814d 100755
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -57,27 +57,26 @@ SOURCE_SUM=2ba3c9d4dd3c7e38885b37e02337906a1ee91febe6d5c9159d89a9050f2eea8f" > "
 	PREFIX=$N_PREFIX make install 2>&1)
 }
 
-ynh_use_nodejs () {
-	nodejs_version=$(ynh_app_setting_get $app nodejs_version)
-
-	load_n_path="[[ :$PATH: == *\":$n_install_dir/bin:\"* ]] || PATH=\"$n_install_dir/bin:$PATH\"; N_PREFIX="$n_install_dir""
-
-	nodejs_use_version="$n_install_dir/bin/n -q $nodejs_version"
-
-	# "Load" a version of node
-	eval $load_n_path; $nodejs_use_version
-
-	# Get the absolute path of this version of node
-	nodejs_path="$(n bin $nodejs_version)"
-
-	# Make an alias for node use
-	ynh_node_exec="eval $load_n_path; n use $nodejs_version"
-}
+# ynh_use_nodejs () {
+# 	nodejs_version=$(ynh_app_setting_get $app nodejs_version)
+#
+# 	load_n_path="[[ :$PATH: == *\":$n_install_dir/bin:\"* ]] || PATH=\"$n_install_dir/bin:$PATH\"; N_PREFIX="$n_install_dir""
+#
+# 	nodejs_use_version="$n_install_dir/bin/n -q $nodejs_version"
+#
+# 	# "Load" a version of node
+# 	eval $load_n_path; $nodejs_use_version
+#
+# 	# Get the absolute path of this version of node
+# 	nodejs_path="$(n bin $nodejs_version)"
+#
+# 	# Make an alias for node use
+# 	ynh_node_exec="eval $load_n_path; n use $nodejs_version"
+# }
 
 ynh_install_nodejs () {
 	# Use n, https://github.com/tj/n to manage the nodejs versions
 	nodejs_version="$1"
-	local n_install_script="https://git.io/n-install"
 
 	# Create $n_install_dir
 	mkdir -p "$n_install_dir"
@@ -129,22 +128,28 @@ ynh_install_nodejs () {
 	# Build the update script and set the cronjob
 	ynh_cron_upgrade_node
 
-	ynh_use_nodejs
+#	ynh_use_nodejs
+}
+
+# print the path of node/npm binaries for a specific version of node
+ynh_get_nodejs_bindir () {
+	nodejs_version="$1"
+	dirname $(/opt/node_n/bin/n bin $nodejs_version)
 }
 
 ynh_remove_nodejs () {
-	ynh_use_nodejs
+#	ynh_use_nodejs
 
 	# Remove the line for this app
 	sed --in-place "/$YNH_APP_ID:$nodejs_version/d" "$n_install_dir/ynh_app_version"
 
-	# If none another app uses this version of nodejs, remove it.
+	# If no another app uses this version of nodejs, remove it.
 	if ! grep --quiet "$nodejs_version" "$n_install_dir/ynh_app_version"
 	then
 		n rm $nodejs_version
 	fi
 
-	# If none another app uses n, remove n
+	# If no another app uses n, remove n
 	if [ ! -s "$n_install_dir/ynh_app_version" ]
 	then
 		ynh_secure_remove "$n_install_dir"
@@ -307,15 +312,15 @@ ynh_add_fail2ban_config () {
    failregex=$2
    max_retry=${3:-3}
    ports=${4:-http,https}
-   
+
   test -n "$logpath" || ynh_die "ynh_add_fail2ban_config expects a logfile path as first argument and received nothing."
   test -n "$failregex" || ynh_die "ynh_add_fail2ban_config expects a failure regex as second argument and received nothing."
-  
+
   finalfail2banjailconf="/etc/fail2ban/jail.d/$app.conf"
   finalfail2banfilterconf="/etc/fail2ban/filter.d/$app.conf"
   ynh_backup_if_checksum_is_different "$finalfail2banjailconf" 1
   ynh_backup_if_checksum_is_different "$finalfail2banfilterconf" 1
-  
+
   sudo tee $finalfail2banjailconf <<EOF
 [$app]
 enabled = true
@@ -335,7 +340,7 @@ EOF
 
   ynh_store_file_checksum "$finalfail2banjailconf"
   ynh_store_file_checksum "$finalfail2banfilterconf"
-  
+
   systemctl restart fail2ban
   local fail2ban_error="$(journalctl -u fail2ban | tail -n50 | grep "WARNING.*$app.*")"
   if [ -n "$fail2ban_error" ]
diff --git a/scripts/install b/scripts/install
index ac888e4..ae64f6a 100644
--- a/scripts/install
+++ b/scripts/install
@@ -108,8 +108,8 @@ ynh_use_logrotate
 #=================================================
 
 # Install dependencies and proceed with the installation
-ynh_use_nodejs
-(cd $final_path && npm install --production > $install_log 2>&1)
+nodedir=$(ynh_get_nodejs_bindir $nodejs_version)
+(cd $final_path && PATH=$nodedir:$PATH npm install --production > $install_log 2>&1)
 
 #=================================================
 # CONFIGURE
@@ -135,8 +135,8 @@ chmod 600 "$final_path/config/db.json"	# Restrict access to db.json
 # SETUP SYSTEMD
 #=================================================
 
-ynh_replace_string "__NODEJS__" "$nodejs_use_version" "../conf/systemd.service"
-ynh_replace_string "__ENV_PATH__" "$PATH" "../conf/systemd.service"
+#ynh_replace_string "__NODEJS__" "$nodejs_use_version" "../conf/systemd.service"
+ynh_replace_string "__NODE_DIR__" "$nodedir" "../conf/systemd.service"
 ynh_replace_string "__PORT__" "$port" "../conf/systemd.service"
 ynh_replace_string "__FINAL_PATH__" "$final_path" "../conf/systemd.service"
 ynh_add_systemd_config
@@ -145,6 +145,8 @@ ynh_add_systemd_config
 # ENABLE SERVICE IN ADMIN PANEL
 #=================================================
 
+systemctl start $app.service
+
 # Add service to YunoHost monitoring panel
 yunohost service add $app
 
diff --git a/scripts/restore b/scripts/restore
index 6f4cadd..3d28c29 100644
--- a/scripts/restore
+++ b/scripts/restore
@@ -89,11 +89,11 @@ ynh_restore_file "/etc/logrotate.d/$app"
 ynh_install_nodejs $nodejs_version
 
 #=================================================
-# INSTALL ETHERPAD DEPENDENCIES
+# INSTALL DEPENDENCIES
 #=================================================
-
-ynh_use_nodejs
-npm cache clean
+nodedir=$(ynh_get_nodejs_bindir $nodejs_version)
+PATH=$nodedir:$PATH npm cache clean
+PATH=$nodedir:$PATH npm update
 
 #=================================================
 # ENABLE SERVICE IN ADMIN PANEL
@@ -108,6 +108,7 @@ yunohost service add $app --log "/var/log/$app/timeoff.log"
 ynh_restore_file "/etc/systemd/system/$app.service"
 ## Démarrage auto du service
 systemctl enable $app.service
+systemctl start $app.service
 
 #=================================================
 # RESTORE FAIL2BAN CONFIGURATION
diff --git a/scripts/upgrade b/scripts/upgrade
index d062acb..ca813fd 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -19,7 +19,6 @@ app=$YNH_APP_INSTANCE_NAME
 
 domain=$(ynh_app_setting_get $app domain)
 path_url=$(ynh_app_setting_get $app path)
-admin=$(ynh_app_setting_get $app admin)
 final_path=$(ynh_app_setting_get $app final_path)
 port=$(ynh_app_setting_get $app port)
 
@@ -78,9 +77,9 @@ ynh_install_nodejs $nodejs_version
 #=================================================
 # UPGRADE NPM MODULES
 #=================================================
-
-npm cache clean
-npm update
+nodedir=$(ynh_get_nodejs_bindir $nodejs_version)
+PATH=$nodedir:$PATH npm cache clean
+PATH=$nodedir:$PATH npm update
 
 #=================================================
 # SPECIFIC UPGRADE
@@ -135,6 +134,8 @@ ynh_replace_string "__PORT__" "$port" "../conf/systemd.service"
 ynh_replace_string "__FINAL_PATH__" "$final_path" "../conf/systemd.service"
 ynh_add_systemd_config
 
+systemctl restart $app.service
+
 #=================================================
 # RELOAD NGINX
 #=================================================