diff --git a/youtube/templates/subscription_manager.html b/youtube/templates/subscription_manager.html
index cf51a9b..5db5d8d 100644
--- a/youtube/templates/subscription_manager.html
+++ b/youtube/templates/subscription_manager.html
@@ -20,7 +20,7 @@
         <form class="subscriptions-import-form" enctype="multipart/form-data" action="/youtube.com/import_subscriptions" method="POST">
             <h2>Import subscriptions</h2>
             <div class="subscriptions-import-options">
-                <input type="file" id="subscriptions-import" accept="application/json, application/xml, text/x-opml, text/csv" name="subscriptions_file">
+                <input type="file" id="subscriptions-import" accept="application/json, application/xml, text/x-opml, text/csv" name="subscriptions_file" required>
                 <input type="submit" value="Import">
             </div>
         </form>