diff --git a/frontend/src/pages/settings/SubscriptionGeneralTab.tsx b/frontend/src/pages/settings/SubscriptionGeneralTab.tsx
index 72f2c138c..a0ce07e31 100644
--- a/frontend/src/pages/settings/SubscriptionGeneralTab.tsx
+++ b/frontend/src/pages/settings/SubscriptionGeneralTab.tsx
@@ -79,7 +79,7 @@ export default function SubscriptionGeneralTab({ allSetting, updateSetting }: Su
             </SettingListItem>
 
             <SettingListItem paddings="small" title={t('pages.settings.subUpdates')} description={t('pages.settings.subUpdatesDesc')}>
-              <InputNumber value={allSetting.subUpdates} min={1} style={{ width: '100%' }}
+              <InputNumber value={allSetting.subUpdates} min={0} max={525600} style={{ width: '100%' }}
                 onChange={(v) => updateSetting({ subUpdates: Number(v) || 0 })} />
             </SettingListItem>
           </>
diff --git a/frontend/src/schemas/setting.ts b/frontend/src/schemas/setting.ts
index e7d39ba86..bc6f81321 100644
--- a/frontend/src/schemas/setting.ts
+++ b/frontend/src/schemas/setting.ts
@@ -53,7 +53,7 @@ export const AllSettingSchema = z.object({
   restartXrayOnClientDisable: z.boolean().optional(),
   subCertFile: z.string().optional(),
   subKeyFile: z.string().optional(),
-  subUpdates: z.number().int().min(1).max(168).optional(),
+  subUpdates: z.number().int().min(0).max(525600).optional(),
   subEncrypt: z.boolean().optional(),
   subURI: z.string().optional(),
   subJsonURI: z.string().optional(),
diff --git a/frontend/src/test/setting-sub-updates.test.ts b/frontend/src/test/setting-sub-updates.test.ts
new file mode 100644
index 000000000..56849896b
--- /dev/null
+++ b/frontend/src/test/setting-sub-updates.test.ts
@@ -0,0 +1,17 @@
+import { describe, it, expect } from 'vitest';
+import { AllSettingSchema } from '@/schemas/setting';
+
+describe('subUpdates range', () => {
+  it('accepts values the backend allows (gte=0, lte=525600)', () => {
+    for (const v of [0, 12, 168, 720, 525600]) {
+      const r = AllSettingSchema.safeParse({ subUpdates: v });
+      expect(r.success, `subUpdates=${v} should be valid`).toBe(true);
+    }
+  });
+
+  it('rejects values outside the backend range', () => {
+    for (const v of [-1, 525601, 1.5]) {
+      expect(AllSettingSchema.safeParse({ subUpdates: v }).success, `subUpdates=${v} should be invalid`).toBe(false);
+    }
+  });
+});