diff --git a/config/redis.php b/config/redis.php
index 21e3dcd..95562be 100644
--- a/config/redis.php
+++ b/config/redis.php
@@ -14,10 +14,10 @@
 
 return [
     'default' => [
-        'host'     => get_env('CACHE_HOSTNAME') ?? '127.0.0.1',
-        'password' => get_env('REDIS_PASSWORD'),
-        'port'     => get_env('CACHE_HOSTPORT') ?? 6379,
-        'database' => get_env('CACHE_SELECT') ?? 0,
+        'host'     => get_env('CACHE_HOSTNAME', '127.0.0.1'),
+        'password' => get_env('REDIS_PASSWORD', null),
+        'port'     => (int)get_env('CACHE_HOSTPORT',6379),
+        'database' => get_env('CACHE_SELECT', 0),
         'prefix'   => 'redis_',
         'expire'   => 0,
     ],
diff --git a/support/helpers.php b/support/helpers.php
index bc1094d..44be51e 100644
--- a/support/helpers.php
+++ b/support/helpers.php
@@ -140,7 +140,7 @@ if (!function_exists('get_env')) {
     /**
      * Get environment variable
      */
-    function get_env($var)
+    function get_env($var, $default = '')
     {
         $dir = str_replace('\\', '/', realpath(__DIR__ . '/../'));
         $env_path = $dir . '/.env';
@@ -148,7 +148,7 @@ if (!function_exists('get_env')) {
         if (is_file($env_path) && !$env_info) {
             $env_info = parse_ini_file($env_path, true);
         }
-        return $env_info[$var] ?? '';
+        return $env_info[$var] ?? $default;
     }
 }