diff --git a/src/Entity/EntityInterface.php b/src/Entity/EntityInterface.php
index 42b9cdb..c935ba4 100644
--- a/src/Entity/EntityInterface.php
+++ b/src/Entity/EntityInterface.php
@@ -17,6 +17,6 @@ interface EntityInterface /* extends \JsonSerializable */
     public static function repository(string $alias = Repository::DEFAULT_ALIAS, ConnectionAdapter $adapter = null) : Repository;
     public static function entityCollection(...$arguments) : EntityCollection;
     public static function queryBuilder() : QueryBuilderInterface;
-    public static function field($name, null|string|bool $alias = Repository::DEFAULT_ALIAS) : EntityField;
-    public static function fields(array $fields, null|string|bool $alias = Repository::DEFAULT_ALIAS, string $separator = ', ') : string;
+    public static function field($name, null|string|false $alias = Repository::DEFAULT_ALIAS) : EntityField;
+    public static function fields(array $fields, null|string|false $alias = Repository::DEFAULT_ALIAS, string $separator = ', ') : string;
 }
\ No newline at end of file
diff --git a/src/EntityTrait.php b/src/EntityTrait.php
index 0f98799..dddb375 100644
--- a/src/EntityTrait.php
+++ b/src/EntityTrait.php
@@ -316,7 +316,7 @@ trait EntityTrait {
     }
 
     #[Ignore]
-    public static function fields(array $fields, null|string|bool $alias = Repository::DEFAULT_ALIAS, string $separator = ', ') : string
+    public static function fields(array $fields, null|string|false $alias = Repository::DEFAULT_ALIAS, string $separator = ', ') : string
     {
         return implode($separator, array_map(function($item) use ($alias){
             return static::field($item, $alias);