diff --git a/rate-limiter.php b/rate-limiter.php
index 67be859..827a764 100644
--- a/rate-limiter.php
+++ b/rate-limiter.php
@@ -15,6 +15,8 @@
     'id' => getenv('RATE_LIMIT_ID'),
     'interval' => getenv('RATE_LIMIT_INTERVAL'),
     'host' => 'localhost',
+    'auth' => ['redis-username', 'redis-password'],
+    'db' => 0,
     'prefix' => 'waf:ratelimit:',
 ]);
 
@@ -33,15 +35,23 @@ function rate_limit(array $options): void
     }
 
     $key = preg_replace('/[^a-zA-Z0-9_\-\.]/', '_', $key);
- 
+
     try {
         $redis = new Redis();
         if (!$redis->connect($host, 6379)) {
             error_log('Failed to connect to Redis server.');
             return;
         }
+        if (!$redis->auth($options['auth'])) {
+            error_log('Failed to authenticate to Redis server.');
+            return;
+        }
+        if (!$redis->select($options['db'])) {
+            error_log('Failed to select Redis database.');
+            return;
+        }
     } catch (\RedisException $e) {
-        error_log('Redis connection failed: ' . $e->getMessage());
+        error_log('Redis connection error: ' . $e->getMessage());
         return;
     }