diff --git a/packages/ui-default/package.json b/packages/ui-default/package.json
index 2aa2f56f1..aaca3e658 100644
--- a/packages/ui-default/package.json
+++ b/packages/ui-default/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@hydrooj/ui-default",
-  "version": "4.52.0",
+  "version": "4.52.1",
   "author": "undefined <i@undefined.moe>",
   "license": "AGPL-3.0",
   "main": "index.ts",
diff --git a/packages/ui-default/pages/problem_detail.page.tsx b/packages/ui-default/pages/problem_detail.page.tsx
index ecda3f84f..e2367de11 100644
--- a/packages/ui-default/pages/problem_detail.page.tsx
+++ b/packages/ui-default/pages/problem_detail.page.tsx
@@ -262,9 +262,9 @@ const page = new NamedPage(['problem_detail', 'contest_detail_problem', 'homewor
     }
     async function loadAns() {
       const saved = await db.get('solutions', `${cacheKey}#objective`);
-      if (!saved) return;
+      if (typeof saved?.value !== 'string') return;
       const isValidOption = (v) => v.length === 1 && v.charCodeAt(0) >= 65 && v.charCodeAt(0) <= 90;
-      Object.assign(ans, JSON.parse(saved));
+      Object.assign(ans, JSON.parse(saved?.value || '{}'));
       for (const [id, val] of Object.entries(ans)) {
         if (Array.isArray(val)) {
           for (const v of val) {
diff --git a/packages/ui-default/utils/db.ts b/packages/ui-default/utils/db.ts
index 9ebb172f0..02e945296 100644
--- a/packages/ui-default/utils/db.ts
+++ b/packages/ui-default/utils/db.ts
@@ -11,7 +11,7 @@ export const openDB = _open('hydro', 1, {
       for (const key of keys) {
         if (key.endsWith('#objective')) {
           const value = localStorage.getItem(key);
-          if (value) solutionStore.put({ id: key, value: JSON.parse(value) });
+          if (value) solutionStore.put({ id: key, value });
           localStorage.removeItem(key);
         }
         if (key.startsWith('scoreboard-star/')) localStorage.removeItem(key);