diff --git a/app/Utils/CacheKey.php b/app/Utils/CacheKey.php
index 8f11de91..302d43f4 100644
--- a/app/Utils/CacheKey.php
+++ b/app/Utils/CacheKey.php
@@ -9,7 +9,7 @@ class CacheKey
         'LAST_SEND_EMAIL_VERIFY_TIMESTAMP' => '最后一次发送邮箱验证码时间'
     ];
 
-    public static function get(string $key, $uniqueValue):string
+    public static function get(string $key, $uniqueValue)
     {
         if (!in_array($key, array_keys(self::KEYS))) {
             abort(500, 'key is not in cache key list');