diff --git a/LeanCloudFeedback/LCUserFeedbackThread.m b/LeanCloudFeedback/LCUserFeedbackThread.m
index 04cccdf..bb8f802 100644
--- a/LeanCloudFeedback/LCUserFeedbackThread.m
+++ b/LeanCloudFeedback/LCUserFeedbackThread.m
@@ -54,7 +54,7 @@ -(NSMutableDictionary *)postData {
     if (_remarks) {
         [data setObject:self.remarks forKey:@"remarks"];
     }
-    _iid = [AVInstallation currentInstallation].objectId;
+    _iid = [AVInstallation defaultInstallation].objectId;
     if (_iid) {
         [data setObject:self.iid forKey:@"iid"];
     }
@@ -188,14 +188,11 @@ - (void)fetchFeedbackRepliesInBackgroundWithBlock:(AVArrayResultBlock)block {
         dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
             for (LCUserFeedbackReply *reply in replies) {
                 if (reply.attachment) {
-                    AVFile *attachmentFile = [AVFile fileWithURL:reply.attachment];
-                    NSError *error;
-                    NSData *data;
-                    data = [attachmentFile getData:&error];
-                    if (error) {
-                        FLog(@"attachment getData error");
-                    } else {
+                    NSData *data = [NSData dataWithContentsOfURL:[NSURL URLWithString:reply.attachment]];
+                    if (data) {
                         reply.attachmentImage = [UIImage imageWithData:data];
+                    } else {
+                        FLog(@"attachment getData error");
                     }
                 }
             }
diff --git a/LeanCloudFeedback/LCUserFeedbackViewController.m b/LeanCloudFeedback/LCUserFeedbackViewController.m
index 2da849d..d7e7395 100644
--- a/LeanCloudFeedback/LCUserFeedbackViewController.m
+++ b/LeanCloudFeedback/LCUserFeedbackViewController.m
@@ -308,8 +308,8 @@ - (void)imagePickerController:(UIImagePickerController *)picker didFinishPicking
     UIImage *originImage = info[UIImagePickerControllerOriginalImage];
     [self prepareFeedbackWithBlock:^(BOOL succeeded, NSError *error) {
         if ([self filterError:error]) {
-            AVFile *attachment = [AVFile fileWithName:@"feedback.png" data:UIImageJPEGRepresentation(originImage, 0.6)];
-            [attachment saveInBackgroundWithBlock:^(BOOL succeeded, NSError *error) {
+            AVFile *attachment = [AVFile fileWithData:UIImageJPEGRepresentation(originImage, 0.6) name:@"feedback.png"];
+            [attachment uploadWithCompletionHandler:^(BOOL succeeded, NSError *error) {
                 if ([self filterError:error]) {
                     LCUserFeedbackReply *feedbackReply = [LCUserFeedbackReply feedbackReplyWithAttachment:attachment.url type:LCReplyTypeUser];
                     feedbackReply.attachmentImage = originImage;
diff --git a/Podfile b/Podfile
index c0ebf4d..90f54ae 100644
--- a/Podfile
+++ b/Podfile
@@ -9,11 +9,11 @@ workspace 'LeanCloudFeedback.xcworkspace'
 
 target 'LeanCloudFeedback' do
     project 'LeanCloudFeedback.xcodeproj'
-    pod 'AVOSCloud'
+    pod 'AVOSCloud', '10.1.0'
 end
 
 target 'LeanCloudFeedbackDemo' do
     project 'LeanCloudFeedbackDemo/LeanCloudFeedbackDemo.xcodeproj'
-    pod 'AVOSCloud'
+    pod 'AVOSCloud', '10.1.0'
     pod 'LeanCloudFeedback', :path => '.'
 end