diff --git a/scripts/upgrade b/scripts/upgrade
index 94e197d..fcdce6f 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -45,7 +45,10 @@ if $(ynh_compare_current_package_version --comparison le --version "2.6.2~ynh4")
 then
 	# Purge old root directory's contents
 	ynh_script_progression --message="Removing old files..." --weight=2
-	ynh_secure_remove --file="$install_dir" 
+	mkdir "$install_dir/release"
+	chmod -R o-rwx "$install_dir/release"
+	chown -R $app:www-data "$install_dir/release"
+	mv -f $install_dir/* $install_dir/.[!.]* $install_dir/release
 fi
 
 if [[ "$upgrade_type" == "UPGRADE_APP" || $(ynh_compare_current_package_version --comparison le --version "2.6.2~ynh4") ]]; then