diff --git a/src/Director/BodyTo/BodyToRule.php b/src/Director/BodyTo/BodyToRule.php
index eeedb22..4271193 100644
--- a/src/Director/BodyTo/BodyToRule.php
+++ b/src/Director/BodyTo/BodyToRule.php
@@ -29,7 +29,7 @@ public static function build(array $data): Rule
             ->setTriggerType($data['trigger_type'])
             ->setConditionData($data['condition_data'])
             ->setName($data['name'])
-            ->setReadonly($data['readonly'])
+            ->setReadonly($data['readonly'] ?? null)
             ->setDeletedAt($data['deleted_at'] ? self::date($data, 'deleted_at') : null)
             ->setCreatedAt(self::date($data, 'created_at'))
             ->setUpdatedAt($data['updated_at'] ? self::date($data, 'updated_at') : null)
diff --git a/src/Entity/RuleInternal.php b/src/Entity/RuleInternal.php
index e6a9977..c362a75 100644
--- a/src/Entity/RuleInternal.php
+++ b/src/Entity/RuleInternal.php
@@ -51,7 +51,7 @@ public function setUpdatedAt(?DateTimeImmutable $updatedAt): self
     /**
      * @internal
      */
-    public function setReadonly(bool $readonly): self
+    public function setReadonly(?bool $readonly): self
     {
         $this->readonly = $readonly;