diff --git a/templates/index.html b/templates/index.html
index c923889..a1ffa63 100644
--- a/templates/index.html
+++ b/templates/index.html
@@ -45,9 +45,9 @@
         <form method="POST">
             <div>
                 <label for="shortcode">Emoji shortcode</label>
-                <input type="text" id="shortcode" name="shortcode" placeholder="blobcatNotLikeThis">
+                <input type="text" id="shortcode" name="shortcode" placeholder="blobcatNotLikeThis" required>
                 <label for="url">Emoji URL</label>
-                <input type="text" id="url" name="url" placeholder="https://...">
+                <input type="text" id="url" name="url" placeholder="https://..." required>
             </div>
             <input type="submit">
         </form>