diff --git a/doc/DISCLAIMER.md b/doc/DISCLAIMER.md
index de2af82..0c7ecc6 100644
--- a/doc/DISCLAIMER.md
+++ b/doc/DISCLAIMER.md
@@ -2,4 +2,5 @@
     * The database credentials are send to the admin be email.
 
 * How to upgrade:
-    * `https://www.domain.ltd/mybb/install/upgrade.php` and follow the post install.
+	* Remove the lock file `sudo rm /var/www/mybb/install/lock`
+    * and follow the post install `https://www.domain.ltd/mybb/install/upgrade.php`
diff --git a/scripts/change_url b/scripts/change_url
index 51a3236..ff06606 100644
--- a/scripts/change_url
+++ b/scripts/change_url
@@ -24,7 +24,7 @@ app=$YNH_APP_INSTANCE_NAME
 #=================================================
 # LOAD SETTINGS
 #=================================================
-ynh_script_progression --message="Loading installation settings..." --time --weight=1
+ynh_script_progression --message="Loading installation settings..." --weight=1
 
 # Needed for helper "ynh_add_nginx_config"
 final_path=$(ynh_app_setting_get --app=$app --key=final_path)
@@ -32,7 +32,7 @@ final_path=$(ynh_app_setting_get --app=$app --key=final_path)
 #=================================================
 # BACKUP BEFORE CHANGE URL THEN ACTIVE TRAP
 #=================================================
-ynh_script_progression --message="Backing up the app before changing its URL (may take a while)..." --time --weight=1
+ynh_script_progression --message="Backing up the app before changing its URL (may take a while)..." --weight=1
 
 # Backup the current version of the app
 ynh_backup_before_upgrade
@@ -65,7 +65,7 @@ fi
 #=================================================
 # MODIFY URL IN NGINX CONF
 #=================================================
-ynh_script_progression --message="Updating NGINX web server configuration..." --time --weight=1
+ynh_script_progression --message="Updating NGINX web server configuration..." --weight=1
 
 nginx_conf_path=/etc/nginx/conf.d/$old_domain.d/$app.conf
 
@@ -94,7 +94,7 @@ fi
 #=================================================
 # RELOAD NGINX
 #=================================================
-ynh_script_progression --message="Reloading NGINX web server..." --time --weight=1
+ynh_script_progression --message="Reloading NGINX web server..." --weight=1
 
 ynh_systemd_action --service_name=nginx --action=reload
 
@@ -102,4 +102,4 @@ ynh_systemd_action --service_name=nginx --action=reload
 # END OF SCRIPT
 #=================================================
 
-ynh_script_progression --message="Change of URL completed for $app" --time --last
+ynh_script_progression --message="Change of URL completed for $app" --last