diff --git a/msgbox/msgbox.css b/msgbox/msgbox.css
index 991d0277..5a5ab860 100644
--- a/msgbox/msgbox.css
+++ b/msgbox/msgbox.css
@@ -60,6 +60,8 @@
   padding: .75rem 24px .75rem 52px;
   font-size: 1rem;
   position: relative;
+  min-height: 42px;
+  box-sizing: border-box;
 }
 
 #message-box-title::before {