diff --git a/mediapipe/tasks/ios/vision/object_detector/sources/MPPObjectDetector.mm b/mediapipe/tasks/ios/vision/object_detector/sources/MPPObjectDetector.mm
index 8c8b0c3bb..6d02710a7 100644
--- a/mediapipe/tasks/ios/vision/object_detector/sources/MPPObjectDetector.mm
+++ b/mediapipe/tasks/ios/vision/object_detector/sources/MPPObjectDetector.mm
@@ -37,8 +37,8 @@ static NSString *const kImageOutStreamName = @"image_out";
 static NSString *const kImageTag = @"IMAGE";
 static NSString *const kNormRectStreamName = @"norm_rect_in";
 static NSString *const kNormRectTag = @"NORM_RECT";
-
 static NSString *const kTaskGraphName = @"mediapipe.tasks.vision.ObjectDetectorGraph";
+static NSString *const kTaskName = @"objectDetector";
 
 #define InputPacketMap(imagePacket, normalizedRectPacket) \
   {                                                       \
@@ -58,6 +58,7 @@ static NSString *const kTaskGraphName = @"mediapipe.tasks.vision.ObjectDetectorG
 
 - (instancetype)initWithOptions:(MPPObjectDetectorOptions *)options error:(NSError **)error {
   self = [super init];
+  NSLog(@"Object Detector Initializing with dispatch queu and weak self");
   if (self) {
     MPPTaskInfo *taskInfo = [[MPPTaskInfo alloc]
         initWithTaskGraphName:kTaskGraphName
@@ -85,8 +86,12 @@ static NSString *const kTaskGraphName = @"mediapipe.tasks.vision.ObjectDetectorG
       // Capturing `self` as weak in order to avoid `self` being kept in memory
       // and cause a retain cycle, after self is set to `nil`.
       MPPObjectDetector *__weak weakSelf = self;
+      dispatch_queue_t callbackQueue = dispatch_queue_create([MPPVisionTaskRunner uniqueQueueNameWithTaskName:kTaskName], NULL);
       packetsCallback = [=](absl::StatusOr<PacketMap> statusOrPackets) {
-        if ([!weakSelf && weakSelf.objectDetectorDelegate
+        if (!weakSelf) {
+          return;
+        }
+        if (![weakSelf.objectDetectorDelegate
                 respondsToSelector:@selector
                 (objectDetector:didFinishDetectionWithResult:timestampInMilliseconds:error:)]) {
           return;
@@ -94,10 +99,12 @@ static NSString *const kTaskGraphName = @"mediapipe.tasks.vision.ObjectDetectorG
 
         NSError *callbackError = nil;
         if (![MPPCommonUtils checkCppError:statusOrPackets.status() toError:&callbackError]) {
-          [_objectDetectorDelegate objectDetector:weakSelf
+          dispatch_async(callbackQueue, ^{
+            [weakSelf.objectDetectorDelegate objectDetector:weakSelf
                      didFinishDetectionWithResult:nil
                           timestampInMilliseconds:Timestamp::Unset().Value()
                                             error:callbackError];
+          });
           return;
         }
 
@@ -109,15 +116,18 @@ static NSString *const kTaskGraphName = @"mediapipe.tasks.vision.ObjectDetectorG
         MPPObjectDetectionResult *result = [MPPObjectDetectionResult
             objectDetectionResultWithDetectionsPacket:statusOrPackets.value()[kDetectionsStreamName
                                                                                   .cppString]];
-
-        [weakSelf.objectDetectorDelegate
+        
+        NSInteger timeStampInMilliseconds = outputPacketMap[kImageOutStreamName.cppString]
+                                                      .Timestamp()
+                                                      .Value() /
+                                                  kMicroSecondsPerMilliSecond;
+        dispatch_async(callbackQueue, ^{
+          [weakSelf.objectDetectorDelegate
                           objectDetector:weakSelf
             didFinishDetectionWithResult:result
-                 timestampInMilliseconds:outputPacketMap[kImageOutStreamName.cppString]
-                                             .Timestamp()
-                                             .Value() /
-                                         kMicroSecondsPerMilliSecond
+                 timestampInMilliseconds:timeStampInMilliseconds
                                    error:callbackError];
+        });
       };
     }