diff --git a/.php-cs-fixer.dist.php b/.php-cs-fixer.dist.php
index db3d9e34..0a92bf13 100644
--- a/.php-cs-fixer.dist.php
+++ b/.php-cs-fixer.dist.php
@@ -8,7 +8,7 @@
         '@Symfony:risky' => true,
         'protected_to_private' => false,
         'native_constant_invocation' => ['strict' => false],
-        'nullable_type_declaration_for_default_null_value' => ['use_nullable_type_declaration' => false],
+        'nullable_type_declaration_for_default_null_value' => true,
         'modernize_strpos' => true,
     ])
     ->setRiskyAllowed(true)
diff --git a/src/SharedFields/TextTrait.php b/src/SharedFields/TextTrait.php
index d640b225..96e4d592 100644
--- a/src/SharedFields/TextTrait.php
+++ b/src/SharedFields/TextTrait.php
@@ -18,7 +18,7 @@ trait TextTrait
      */
     protected $text;
 
-    public function setText(string $text = null): self
+    public function setText(?string $text = null): self
     {
         $this->text = $text;