diff --git a/scripts/upgrade b/scripts/upgrade
index c2a4325..5920455 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -63,6 +63,19 @@ if [ -z "$db_name" ]; then
 	ynh_app_setting_set --app=$app --key=db_name --value=$db_name
 fi
 
+
+# Cleaning legacy permissions
+if ynh_legacy_permissions_exists; then
+	ynh_legacy_permissions_delete_all
+
+	ynh_app_setting_delete --app=$app --key=is_public
+fi
+
+if ! ynh_permission_exists --permission="admin"; then
+	# Create the required permissions
+	ynh_permission_create --permission="admin" --url="/admin" --allowed="all_users"
+fi
+
 #=================================================
 # CREATE DEDICATED USER
 #=================================================