diff --git a/src/packages/com_mokobackup/src/Engine/BackupEngine.php b/src/packages/com_mokobackup/src/Engine/BackupEngine.php
index a09758b9..437cd0ac 100644
--- a/src/packages/com_mokobackup/src/Engine/BackupEngine.php
+++ b/src/packages/com_mokobackup/src/Engine/BackupEngine.php
@@ -58,9 +58,9 @@ class BackupEngine
 
 		// Create backup record
 		$now         = date('Y-m-d H:i:s');
-		$tag         = date('Ymd-His');
+		$tag         = date('Ymd_His');
 		$hostname    = preg_replace('/[^a-zA-Z0-9._-]/', '', $_SERVER['HTTP_HOST'] ?? $_SERVER['SERVER_NAME'] ?? php_uname('n'));
-		$archiveName = $hostname . '-' . $tag . '-profile' . $profileId . '.zip';
+		$archiveName = $hostname . '_' . $tag . '_profile' . $profileId . '.zip';
 
 		if (empty($description)) {
 			$description = $profile->title . ' — ' . $now;