diff --git a/templates/index.jinja2 b/templates/index.jinja2
index bb729b3..36a9de3 100644
--- a/templates/index.jinja2
+++ b/templates/index.jinja2
@@ -58,7 +58,7 @@
                     </div>
 
                     <div class="input-group mt-3">
-                        <input name="comment" type="text" class="form-control" placeholder="Comment" aria-label="Comment">
+                        <input required name="comment" type="text" class="form-control" placeholder="Comment" aria-label="Comment">
                     </div>
                 </div>
                 <div class="modal-footer">