diff --git a/docs/500.html b/docs/500.html
index ca42fe1..ae105fe 100644
--- a/docs/500.html
+++ b/docs/500.html
@@ -15,6 +15,8 @@
 <div class="container">
     <div class="left">
         <svg
+            role="img"
+            aria-label="Triangle with exclamation point icon"
             width="300"
             height="300"
             viewBox="0 0 300 300"