diff --git a/health.php b/health.php
index 402ece8..3028a97 100644
--- a/health.php
+++ b/health.php
@@ -52,7 +52,7 @@ try {
     $ping = $redis->ping();
     
     $health['checks']['redis'] = [
-        'status' => ($ping === 'PONG' || $ping === true) ? 'ok' : 'error',
+        'status' => ((string)$ping === 'PONG' || $ping === true) ? 'ok' : 'error',
         'host' => getenv('REDIS_HOST') ?: 'redis'
     ];
 } catch (Exception $e) {