diff --git a/conf/app.json b/conf/app.json
index 2e1ff4a..4404517 100644
--- a/conf/app.json
+++ b/conf/app.json
@@ -1,14 +1,14 @@
 {
   "allow_create_new_accounts" : true,
-  "send_emails"              : false,
+  "send_emails" : false,
   "application_sender_email" : "timeoff@__DOMAIN__",
   "email_transporter" : {
     "host" : "localhost",
-    "port" : 25,
+    "port" : 25
   },
   "ga_analytics_on" : false,
   "crypto_secret" : "!2~`HswpPPLa22+=±§sdq qwe,appp qwwokDF_",
   "application_domain" : "http://__DOMAIN__",
   "promotion_website_domain" : "http://timeoff.management",
-  "locale_code_for_sorting": "__LANGUAGE__"
+  "locale_code_for_sorting": "en"
 }
diff --git a/conf/systemd.service b/conf/systemd.service
index a27f238..9bf9929 100644
--- a/conf/systemd.service
+++ b/conf/systemd.service
@@ -6,7 +6,7 @@ After=syslog.target network.target
 Type=simple
 User=__APP__
 Group=__APP__
-#Environment="PORT=__PORT__"
+Environment="PORT=__PORT__"
 Environment="PATH=__ENV_PATH__"
 Environment="NODE_ENV=production"
 WorkingDirectory=__FINALPATH__/
diff --git a/manifest.json b/manifest.json
index 03e84ba..f193c89 100644
--- a/manifest.json
+++ b/manifest.json
@@ -36,16 +36,6 @@
                 "name": "is_public",
                 "type": "boolean",
                 "default": true
-            },
-            {
-                "name": "language",
-                "type": "string",
-                "ask": {
-                    "en": "Choose the application language",
-                    "fr": "Choisissez la langue de l'application"
-                },
-                "choices": ["cs", "de", "fr", "en"],
-                "default": "fr"
             }
 		]
 	}
diff --git a/scripts/_common.sh b/scripts/_common.sh
index acb6dce..1484290 100755
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -5,7 +5,7 @@
 #=================================================
 
 # nodejs version
-nodejs_version=16
+nodejs_version=13
 
 # dependencies used by the app
 pkg_dependencies="sqlite3"
diff --git a/scripts/install b/scripts/install
index 4214831..0c7ec24 100644
--- a/scripts/install
+++ b/scripts/install
@@ -21,7 +21,6 @@ ynh_abort_if_errors	# Active trap pour arrêter le script si une erreur est dét
 
 domain=$YNH_APP_ARG_DOMAIN
 path_url="/"
-language=$YNH_APP_ARG_LANGUAGE
 is_public=$YNH_APP_ARG_IS_PUBLIC
 
 app=$YNH_APP_INSTANCE_NAME
@@ -44,7 +43,6 @@ ynh_script_progression --message="Storing installation settings..."
 
 ynh_app_setting_set --app=$app --key=domain --value=$domain
 ynh_app_setting_set --app=$app --key=path --value=$path_url
-ynh_app_setting_set --app=$app --key=language --value=$language
 
 #=================================================
 # STANDARD MODIFICATIONS
@@ -80,16 +78,6 @@ ynh_script_progression --message="Configuring system user..."
 # Create a system user
 ynh_system_user_create --username=$app --home_dir="$final_path"
 
-#=================================================
-# CREATE A MYSQL DATABASE
-#=================================================
-# ynh_script_progression --message="Creating a MySQL database..."
-
-# db_name=$(ynh_sanitize_dbid --db_name=$app)
-# db_user=$db_name
-# ynh_app_setting_set --app=$app --key=db_name --value=$db_name
-# ynh_mysql_setup_db --db_user=$db_user --db_name=$db_name
-
 #=================================================
 # DOWNLOAD, CHECK AND UNPACK SOURCE
 #=================================================
@@ -102,21 +90,6 @@ ynh_setup_source --dest_dir=$final_path
 chmod 750 "$final_path"
 chmod -R o-rwx "$final_path"
 chown -R $app:www-data "$final_path"
-#chmod -R +x "$final_path/bin"
-
-#=================================================
-# CREATE DATA DIRECTORY
-#=================================================
-ynh_script_progression --message="Creating a data directory..." --weight=1
-
-datadir=/home/yunohost.app/$app
-ynh_app_setting_set --app=$app --key=datadir --value=$datadir
-
-mkdir -p $datadir
-
-chmod 750 "$datadir"
-chmod -R o-rwx "$datadir"
-chown -R $app:www-data "$datadir"
 
 #=================================================
 # NGINX CONFIGURATION
@@ -126,22 +99,6 @@ ynh_script_progression --message="Configuring NGINX web server..."
 # Create a dedicated NGINX config
 ynh_add_nginx_config
 
-#=================================================
-# SPECIFIC SETUP
-#=================================================
-# HANDLE LOG FILES AND LOGROTATE
-#=================================================
-
-# Create log directory
-mkdir -p /var/log/$app
-touch /var/log/$app/installation.log
-install_log=/var/log/$app/installation.log
-touch $install_log
-chown $app -R /var/log/$app
-
-# Setup logrotate
-ynh_use_logrotate
-
 #=================================================
 # INSTALL
 #=================================================