diff --git a/src/CaptchaBuilder.php b/src/CaptchaBuilder.php
index ccfdef3..89fd9e9 100644
--- a/src/CaptchaBuilder.php
+++ b/src/CaptchaBuilder.php
@@ -2,6 +2,7 @@
 
 namespace Webman\Captcha;
 
+use AllowDynamicProperties;
 use \Exception;
 
 /**
@@ -11,6 +12,7 @@
  * @author Gregwar <g.passault@gmail.com>
  * @author Jeremy Livingston <jeremy.j.livingston@gmail.com>
  */
+#[AllowDynamicProperties]
 class CaptchaBuilder implements CaptchaBuilderInterface
 {
     /**
@@ -140,7 +142,7 @@ public function __construct($phrase = null, PhraseBuilderInterface $builder = nu
         } else {
             $this->builder = $builder;
         }
-        
+
         $this->phrase = is_string($phrase) ? $phrase : $this->builder->build($phrase);
     }