diff --git a/src/PDO.Iterator.class.php b/src/PDO.Iterator.class.php
index 6b0a20f..bb1909e 100644
--- a/src/PDO.Iterator.class.php
+++ b/src/PDO.Iterator.class.php
@@ -11,20 +11,24 @@ public function __construct(PDOStatement $pdo, $fetchMode = PDO::FETCH_ASSOC) {
         $this->fetchMode = $fetchMode;
     }
 
+    #[\ReturnTypeWillChange]
     function rewind() {
         $this->position = 0;
         $this->pdo->execute();
         $this->nextResult = $this->pdo->fetch($this->fetchMode, PDO::FETCH_ORI_NEXT);
     }
 
+    #[\ReturnTypeWillChange]
     function current() {
         return $this->nextResult;
     }
 
+    #[\ReturnTypeWillChange]
     function key() {
         return $this->position;
     }
 
+    #[\ReturnTypeWillChange]
     function next() {
         ++$this->position;
         $this->nextResult = $this->pdo->fetch($this->fetchMode, PDO::FETCH_ORI_NEXT);
@@ -37,4 +41,4 @@ function valid() {
         }
         return !$invalid;
     }
-}
\ No newline at end of file
+}