diff --git a/index.html b/index.html
index 52e163e..1efcf45 100644
--- a/index.html
+++ b/index.html
@@ -52,7 +52,7 @@
       <button id="threadsImportOption" class="menu-item">Import threads (.json)</button>
       <button id="threadsExportOption" class="menu-item">Export threads (.json)</button>
     </div>
-    <input id="importInput" type="file" accept="application/json,.json" class="hidden"/>
+    <input id="importInput" type="file" accept="application/json,.json,.sune" class="hidden"/>
   </div>
 </aside>
 <div id="sidebarOverlayRight" class="fixed inset-0 z-40 bg-black/20 hidden" hx-on="click:this.classList.add('hidden');document.getElementById('sidebarRight').classList.add('translate-x-full')"></div>