diff --git a/src/lib/Sidebar.svelte b/src/lib/Sidebar.svelte
index 6cd6d60..8ca0755 100644
--- a/src/lib/Sidebar.svelte
+++ b/src/lib/Sidebar.svelte
@@ -111,8 +111,9 @@
       const url = URL.createObjectURL(blob);
       const link = document.createElement("a");
       link.href = url;
+      const now = new Date();
       const dateTimeStr = now.toISOString().replace(/:\d+\.\d+Z$/, '').replace(/-|:/g, '_');
-      link.download = `ChatGPT-web_${dateTimeStr}.json`;
+      link.download = `ChatGPT-web-${dateTimeStr}.json`;
       document.body.appendChild(link);
       link.click();
       document.body.removeChild(link);