diff --git a/modules/cms-kit/src/Volo.CmsKit.MongoDB/Volo/CmsKit/MongoDB/Pages/MongoPageRepository.cs b/modules/cms-kit/src/Volo.CmsKit.MongoDB/Volo/CmsKit/MongoDB/Pages/MongoPageRepository.cs
index 565530fcb7..1b49ac48bb 100644
--- a/modules/cms-kit/src/Volo.CmsKit.MongoDB/Volo/CmsKit/MongoDB/Pages/MongoPageRepository.cs
+++ b/modules/cms-kit/src/Volo.CmsKit.MongoDB/Volo/CmsKit/MongoDB/Pages/MongoPageRepository.cs
@@ -77,7 +77,7 @@ public class MongoPageRepository : MongoDbRepository<ICmsKitMongoDbContext, Page
         return GetListAsync(x => x.IsHomePage, cancellationToken: GetCancellationToken(cancellationToken));
     }
 
-    public async Task<string> FindTitleAsync(Guid pageId, CancellationToken cancellationToken = default)
+    public async Task<string?> FindTitleAsync(Guid pageId, CancellationToken cancellationToken = default)
     {
         return await (await GetMongoQueryableAsync(cancellationToken)).Where(x => x.Id == pageId).Select(x => x.Title)
             .FirstOrDefaultAsync(cancellationToken);