diff --git a/src/AmoCRM/Models/AccountModel.php b/src/AmoCRM/Models/AccountModel.php
index 96bb6ad8..40407c03 100644
--- a/src/AmoCRM/Models/AccountModel.php
+++ b/src/AmoCRM/Models/AccountModel.php
@@ -301,9 +301,9 @@ public function setAmojoId(?string $id): self
     }
 
     /**
-     * @return bool
+     * @return bool|null
      */
-    public function getIsApiFilterEnabled(): bool
+    public function getIsApiFilterEnabled(): ?bool
     {
         return $this->isApiFilterEnabled;
     }