diff --git a/PyFunceble/checker/availability/extras/rules.py b/PyFunceble/checker/availability/extras/rules.py
index 9e08259f..bf249d71 100644
--- a/PyFunceble/checker/availability/extras/rules.py
+++ b/PyFunceble/checker/availability/extras/rules.py
@@ -98,6 +98,7 @@ def __init__(self, status: Optional[AvailabilityCheckerStatus] = None) -> None:
             r"\.sz.id$": [(self.switch_to_down_if_status_code, 302)],
             r"\.translate\.goog$": [(self.switch_to_down_if_status_code, 403)],
             r"\.tumblr\.com$": [(self.switch_to_down_if_status_code, 404)],
+            r"\.vercel\.app$": [(self.switch_to_down_if_status_code, 451)],
             r"\.web\.app$": [(self.switch_to_down_if_status_code, 404)],
             r"\.wix\.com$": [(self.switch_to_down_if_status_code, 404)],
             r"^s3\.ap-south-1\.amazonaws\.com$": [