diff --git a/src/IteratorImplementation.php b/src/IteratorImplementation.php
index ebbce1f..725d5f0 100644
--- a/src/IteratorImplementation.php
+++ b/src/IteratorImplementation.php
@@ -13,26 +13,31 @@ trait IteratorImplementation
 {
     abstract public function &getList() : array;
 
+    #[\ReturnTypeWillChange]
     public function current()
     {
         return current($this->getList());
     }
 
+    #[\ReturnTypeWillChange]
     public function next()
     {
         next($this->getList());
     }
 
+    #[\ReturnTypeWillChange]
     public function key()
     {
         return key($this->getList());
     }
 
+    #[\ReturnTypeWillChange]
     public function valid()
     {
         return false === key($this->getList());
     }
 
+    #[\ReturnTypeWillChange]
     public function rewind()
     {
         return reset($this->getList());