diff --git a/Pod/Classes/SeafDir.h b/Pod/Classes/SeafDir.h
index 42e609b1..cce0ca32 100644
--- a/Pod/Classes/SeafDir.h
+++ b/Pod/Classes/SeafDir.h
@@ -28,7 +28,7 @@
                     mime:(NSString *)aMime;
 
 @property (readonly, copy) NSArray *allItems;
-@property (readwrite, copy) NSArray *items;
+@property (readonly, copy) NSArray *items;
 @property (readonly) NSArray *uploadFiles;
 @property (readonly) BOOL editable;
 @property (readonly) NSString *perm;
diff --git a/Pod/Classes/SeafRepos.m b/Pod/Classes/SeafRepos.m
index 2678a7ff..9cf5033b 100644
--- a/Pod/Classes/SeafRepos.m
+++ b/Pod/Classes/SeafRepos.m
@@ -388,7 +388,7 @@ - (void)reSortItems
         [self sortItems:repoGroup];
         [allrepos addObjectsFromArray:repoGroup];
     }
-    self.items = allrepos;
+    [self setValue:allrepos forKey:@"_items"];
 }
 
 - (void)reSortItemsByName
diff --git a/Pod/Classes/SeafTaskQueue.m b/Pod/Classes/SeafTaskQueue.m
index 7c49b761..ee06f2ee 100644
--- a/Pod/Classes/SeafTaskQueue.m
+++ b/Pod/Classes/SeafTaskQueue.m
@@ -47,6 +47,7 @@ - (instancetype)init {
                     weakSelf.failedCount += 1;
                 }
             } else {
+                weakSelf.failedCount = 0;
                 if (![weakSelf.completedTasks containsObject:task]) {
                     @synchronized (weakSelf.completedTasks) { // task succeeded, add to completedTasks
                         [weakSelf.completedTasks addObject:task];