diff --git a/scripts/upgrade b/scripts/upgrade
index 1f489b5..29a1208 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -20,6 +20,7 @@ domain=$(ynh_app_setting_get --app=$app --key=domain)
 path_url=$(ynh_app_setting_get --app=$app --key=path)
 final_path=$(ynh_app_setting_get --app=$app --key=final_path)
 port=$(ynh_app_setting_get --app=$app --key=port)
+redis_db=$(ynh_app_setting_get --app=$app --key=redis_db)
 
 #=================================================
 # CHECK VERSION
@@ -132,6 +133,16 @@ then
 	popd
 fi
 
+#=================================================
+# UPDATE A CONFIG FILE
+#=================================================
+ynh_script_progression --message="Updating a configuration file..."
+
+ynh_add_config --template="../conf/config.js" --destination="$final_path/server/config.js"
+
+chmod 400 "$final_path/server/config.js"
+chown $app: "$final_path/server/config.js"
+
 #=================================================
 # SETUP SYSTEMD
 #=================================================