diff --git a/Models/ItemMapper.php b/Models/ItemMapper.php
index 6b753d9..c6d51cb 100644
--- a/Models/ItemMapper.php
+++ b/Models/ItemMapper.php
@@ -30,7 +30,7 @@ final class ItemMapper extends DataMapperAbstract
     /**
      * Columns.
      *
-     * @var array<string, array{name:string, type:string, internal:string, autocomplete?:bool, annotations?:array}>
+     * @var array<string, array{name:string, type:string, internal:string, autocomplete?:bool, readonly?:bool, annotations?:array}>
      * @since 1.0.0
      */
     protected static array $columns = [