diff --git a/content/multipledataset.html b/content/multipledataset.html
index 74dd35f2..a1c0adf9 100644
--- a/content/multipledataset.html
+++ b/content/multipledataset.html
@@ -421,7 +421,7 @@ draft: false
               if (kv !== undefined) {
                 const [val, unsafe] = kv[1]
                 if (unsafe) {
-                  td.append($("<span/>", { title: "unsafe value", style: "font-family: color-emoji;" }).text('⚠'))
+                  td.append($("<span/>", { title: "unsafe value", role:"img", "aria-label":"Warning", style: "font-family: color-emoji;" }).text('⚠'))
                 }
                 if (unsafe && !$("#cb_unsafe").is(':checked')) {
                   td.append($("<s/>").append(val.toString()))
@@ -448,7 +448,7 @@ draft: false
 {{< getDataFilesName >}}
 <noscript>
   <p style="background-color: red; color: white; font-size: 20; font-weight: bold;">
-    <span role="img" style="font-family: color-emoji; font-weight: normal;">⚠</span>
+    <span role="img" aria-label="Warning" style="font-family: color-emoji; font-weight: normal;">⚠</span>
     <span>This website work only if JavaScript is enable. You must enable
       JavaScript.
       <a href="https://www.enable-javascript.com/" target="_blank">How to enable JavaScript ?</a></span>