diff --git a/var/Typecho/Config.php b/var/Typecho/Config.php
index d0cd705a..cc1e8829 100644
--- a/var/Typecho/Config.php
+++ b/var/Typecho/Config.php
@@ -102,6 +102,7 @@ class Config implements \Iterator, \ArrayAccess
      * @access public
      * @return mixed
      */
+    #[\ReturnTypeWillChange]
     public function current()
     {
         return current($this->currentConfig);
@@ -124,6 +125,7 @@ class Config implements \Iterator, \ArrayAccess
      * @access public
      * @return mixed
      */
+    #[\ReturnTypeWillChange]
     public function key()
     {
         return key($this->currentConfig);
@@ -222,6 +224,7 @@ class Config implements \Iterator, \ArrayAccess
      * @param mixed $offset
      * @return mixed
      */
+    #[\ReturnTypeWillChange]
     public function offsetGet($offset)
     {
         return $this->currentConfig[$offset] ?? null;