diff --git a/scripts/upgrade b/scripts/upgrade
index e4c05a1..6d143b4 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -96,6 +96,28 @@ if ynh_version_gt "1.07~ynh2" "${previous_version}" ; then
    yunohost service add mongodb --log "/var/log/mongodb/mongodb.log"
 fi
 
+if ynh_version_gt "3.55~ynh1" "${previous_version}" ; then
+    # Install dependencies
+    ynh_remove_nodejs
+    ynh_install_nodejs --nodejs_version="8.16.2"
+    ynh_use_nodejs
+    
+    # Create a dedicated systemd config
+    ynh_replace_string --match_string="__NODEJS_PATH__" --replace_string="$nodejs_path" --target_file="../conf/systemd.service"
+    ynh_add_systemd_config
+    
+    # Create a dedicated .env config
+    config_file="$final_path/.env"
+    ynh_backup_if_checksum_is_different --file="$config_file"
+    cp "../conf/.env" "$config_file"
+    ynh_replace_string --match_string="__NODEJS_PATH__" --replace_string="$nodejs_path" --target_file="$config_file"
+    ynh_replace_string --match_string="__DB_NAME__" --replace_string="$db_name" --target_file="$config_file"
+    ynh_replace_string --match_string="__DOMAIN__" --replace_string="$domain" --target_file="$config_file"
+    ynh_replace_string --match_string="__DOMAIN_URI__" --replace_string="$domain$path_url" --target_file="$config_file"
+    ynh_replace_string --match_string="__PORT__" --replace_string="$port" --target_file="$config_file"
+    ynh_store_file_checksum "$config_file"
+fi
+
 #=================================================
 # CHECK THE PATH
 #=================================================