diff --git a/public/404.html b/public/404.html
index c858a42849..897ec2c6e4 100644
--- a/public/404.html
+++ b/public/404.html
@@ -41,7 +41,7 @@ <h1>That page does not exist.</h1>
 
           <p>Are you sure you've typed the right address?</p>
 
-          <hr />
+          <hr>
 
           <p>Please help us figure out what happened so we can fix it!</p>