diff --git a/packages/ui-default/components/zipDownloader/index.js b/packages/ui-default/components/zipDownloader/index.js
index 72dcc9c1e..3fd598bf0 100644
--- a/packages/ui-default/components/zipDownloader/index.js
+++ b/packages/ui-default/components/zipDownloader/index.js
@@ -71,6 +71,7 @@ export async function downloadProblemSet(pids, name = 'Export') {
     targets.push({
       filename: `${pid}/problem.yaml`,
       content: dump({
+        pid: pdoc.pid,
         content: pdoc.content,
         owner: pdoc.owner,
         title: pdoc.title,
diff --git a/packages/ui-default/package.json b/packages/ui-default/package.json
index f5e822bf0..022fa2e1f 100644
--- a/packages/ui-default/package.json
+++ b/packages/ui-default/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@hydrooj/ui-default",
-  "version": "4.11.10",
+  "version": "4.11.11",
   "author": "undefined <i@undefined.moe>",
   "license": "AGPL-3.0",
   "main": "hydro.js",