diff --git a/conf/app.ini b/conf/app.ini
index 542ab68..f7303e6 100644
--- a/conf/app.ini
+++ b/conf/app.ini
@@ -27,6 +27,8 @@ SSH_PORT     = __SSH_PORT__
 OFFLINE_MODE = false
 APP_DATA_PATH = __DATA_PATH__
 LANDING_PAGE = explore
+LFS_START_SERVER = true
+LFS_JWT_SECRET = __LFS_KEY__
 
 [mailer]
 ENABLED = true
diff --git a/scripts/change_url b/scripts/change_url
index ed4dfc4..46a03f3 100644
--- a/scripts/change_url
+++ b/scripts/change_url
@@ -25,6 +25,7 @@ app=$YNH_APP_INSTANCE_NAME
 db_password=$(ynh_app_setting_get --app $app --key mysqlpwd)
 admin=$(ynh_app_setting_get --app $app --key adminusername)
 key=$(ynh_app_setting_get --app $app --key secret_key)
+lfs_key=$(ynh_app_setting_get --app $app --key lfs_key)
 port=$(ynh_app_setting_get --app $app --key web_port)
 upstream_version=$(ynh_app_setting_get $app upstream_version)
 
diff --git a/scripts/install b/scripts/install
index d748789..bc590ae 100644
--- a/scripts/install
+++ b/scripts/install
@@ -43,6 +43,7 @@ fi
 ynh_script_progression --message="Defining db password and key..."
 db_password=$(ynh_string_random)
 key=$(ynh_string_random)
+lfs_key=$(ynh_string_random)
 
 # Find available ports
 port=$(ynh_find_port --port 6000)
@@ -52,6 +53,7 @@ ynh_script_progression --message="Storing installation settings..."
 ynh_app_setting_set --app $app --key mysqlpwd --value $db_password
 ynh_app_setting_set --app $app --key adminusername --value $admin
 ynh_app_setting_set --app $app --key secret_key --value $key
+ynh_app_setting_set --app $app --key lfs_key --value $lfs_key
 ynh_app_setting_set --app $app --key web_port --value $port
 
 #=================================================
diff --git a/scripts/upgrade b/scripts/upgrade
index 2e62897..0dd6f73 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -11,28 +11,33 @@ source ./_common.sh
 # IMPORT GENERIC HELPERS
 source /usr/share/yunohost/helpers
 
-# Exit if an error occurs during the execution of the script
-ynh_abort_if_errors
-
-# Retrieve app settings
+#=================================================
+# LOAD SETTINGS
+#=================================================
 ynh_script_progression --message="Loading installation settings..."
-domain=$(ynh_app_setting_get --app $app --key domain)
+
+domain=$(ynh_app_setting_get --app=$app --key=domain)
 path_url=$(ynh_normalize_url_path --path_url $(ynh_app_setting_get --app $app --key path))
-db_password=$(ynh_app_setting_get --app $app --key mysqlpwd)
-admin=$(ynh_app_setting_get --app $app --key adminusername)
-key=$(ynh_app_setting_get --app $app --key secret_key)
-port=$(ynh_app_setting_get --app $app --key web_port)
-upstream_version=$(ynh_app_setting_get --app $app --key upstream_version)
+db_password=$(ynh_app_setting_get --app=$app --key=mysqlpwd)
+admin=$(ynh_app_setting_get --app=$app --key=adminusername)
+key=$(ynh_app_setting_get --app=$app --key=secret_key)
+lfs_key=$(ynh_app_setting_get --app=$app --key=lfs_key)
+port=$(ynh_app_setting_get --app=$app --key=web_port)
+upstream_version=$(ynh_app_setting_get --app=$app --key=upstream_version)
+
+#=================================================
+# STOP SYSTEMD SERVICE
+#=================================================
+ynh_script_progression --message="Stopping a systemd service..." --weight=1
+
+# We stop the service before to set ynh_clean_setup
+ynh_systemd_action --service_name=$app --action="stop"
 
 #=================================================
 # BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
 #=================================================
-ynh_script_progression --message="Backing up the app before upgrading (may take a while)..." --weight=10
+ynh_script_progression --message="Backing up the app before upgrading (may take a while)..."
 
-# We stop the service before to set ynh_clean_setup
-ynh_systemd_action --service_name=$app.service --action=stop
-
-# Backup the current version of the app
 if [ "0$(ynh_app_setting_get --app=$app --key=disable_backup_before_upgrade)" -ne 1 ]
 then
     ynh_backup_before_upgrade
@@ -43,6 +48,20 @@ then
     }
 fi
 
+# Exit if an error occurs during the execution of the script
+ynh_abort_if_errors
+
+#=================================================
+# ENSURE DOWNWARD COMPATIBILITY
+#=================================================
+ynh_script_progression --message="Ensuring downward compatibility..." --weight=1
+
+# If lfs_key doesn't exist, create it
+if [ -z "$lfs_key" ]; then
+   lfs_key=$(ynh_string_random)
+   ynh_app_setting_set --app=$app --key=lfs_key --value=$lfs_key
+fi
+
 #=================================================
 # MIGRATION FROM GOGS
 #=================================================
@@ -96,7 +115,6 @@ fi
 #=================================================
 # STANDARD UPGRADE STEPS
 #=================================================
-
 ynh_script_progression --message="Configuring application..."
 
 # Clean template to fix issue : https://github.com/gogits/gogs/issues/4585