diff --git a/.upptimerc.yml b/.upptimerc.yml
index 75cdb81de..7db8a9c75 100644
--- a/.upptimerc.yml
+++ b/.upptimerc.yml
@@ -55,6 +55,7 @@ sites:
     expectedStatusCodes:
       - 200
       - 201
+      - 400
       - 403
       - 404