diff --git a/res/outage.css b/res/outage.css
index d703444..2572bf7 100644
--- a/res/outage.css
+++ b/res/outage.css
@@ -1,4 +1,5 @@
 .auth_outage_warningbar {
+    box-sizing: content-box;
     position: fixed;
     top: 0px;
     left: 0px;