diff --git a/exmplate/script.js b/exmplate/script.js
index d18e4e8..733eb88 100644
--- a/exmplate/script.js
+++ b/exmplate/script.js
@@ -165,6 +165,11 @@
                 setError(errorMessage, button);
                 return
             }
+            if (typeof data.captcha_key === 'undefined') {
+                setError('Произошла ошибка!', button);
+                return
+            }
+
             shadow.querySelector('button.button-open-window-captcha').remove();
             let captchaVerified = document.createElement('div');
             captchaVerified.innerHTML = `<span class="captcha-verified">Ура!!! Проверку прошли!</span><input type="hidden" name="captcha-verified" value="${ data.captcha_key }">`;