diff --git a/src/lib/Validator/Constraints/FieldValue.php b/src/lib/Validator/Constraints/FieldValue.php
index a652866..746f5a2 100644
--- a/src/lib/Validator/Constraints/FieldValue.php
+++ b/src/lib/Validator/Constraints/FieldValue.php
@@ -17,7 +17,7 @@ class FieldValue extends Constraint
 {
     public $message = 'ez.field.value';
 
-    public function getTargets(): string|array
+    public function getTargets(): string
     {
         return self::CLASS_CONSTRAINT;
     }