diff --git a/password.html b/password.html
index 2895e9fe..b0260a7c 100644
--- a/password.html
+++ b/password.html
@@ -15,6 +15,9 @@
       padding: 10px;
       margin-bottom: 20px;
     }
+    .unsupported-browser-alert {
+      display: none;
+    }
   </style>
 </head>
 <body>
@@ -28,6 +31,11 @@
     <noscript>
         <div class="alert alert-danger"><span class="glyphicon glyphicon-warning-sign"></span> <strong>Hold on.</strong> It looks like you have disabled JavaScript. Unfortunately, this tool will not work until you enable it.</div>
     </noscript>
+    <div class="alert alert-danger unsupported-browser-alert" id="unsupported-browser-alert">
+      <p>
+        <span class="glyphicon glyphicon-warning-sign"></span> <strong>Hold on.</strong> It looks like you are using an <em>unsuported browser</em> (probably Internet Explorer...) Unfortunately, this tool will not work until you upgrade your browser. Sorry for any inconvenience caused.
+      </p>
+    </div>
     <div class="alert alert-info" role="alert">
       <p>Use this online tool to generate a strong and random password. Password generation is done on the client-side meaning no one has access to the passwords you generate here, <em>period</em>.</p>
     </div>
@@ -181,7 +189,13 @@
         }
       };
       function outputGeneratedPassword() {
-        var password = passwordGenerator.generatePassword(getOptions());
+        var password;
+        try {
+          password = passwordGenerator.generatePassword(getOptions());
+        }
+        catch (error) {
+          return $("#unsupported-browser-alert").show();
+        }
         if (password === '') {
           alert("Whops. You unselected all the options. I don't know what characters you want. Click on the button entitled \"Advanced Options\" and enable some options then try again. Nice one");
           return;
