diff --git a/src/Actions/Concerns/ActionContent.php b/src/Actions/Concerns/ActionContent.php
index 3373c26..675aef2 100644
--- a/src/Actions/Concerns/ActionContent.php
+++ b/src/Actions/Concerns/ActionContent.php
@@ -336,7 +336,7 @@ protected function formatActivityData($activity): array
         ];
     }
 
-    protected static function formatDateValues(array|string|null $value): array|string|null
+    protected static function formatDateValues(mixed $value): mixed
     {
         if (is_null($value)) {
             return $value;