diff --git a/SDWebImage/Core/SDWebImageDownloaderOperation.m b/SDWebImage/Core/SDWebImageDownloaderOperation.m
index 67d1a8e2..1de8212a 100644
--- a/SDWebImage/Core/SDWebImageDownloaderOperation.m
+++ b/SDWebImage/Core/SDWebImageDownloaderOperation.m
@@ -54,7 +54,7 @@ typedef NSMutableDictionary<NSString *, id> SDCallbacksDictionary;
 
 @property (strong, nonatomic, readwrite, nullable) NSURLSessionTaskMetrics *metrics API_AVAILABLE(macosx(10.12), ios(10.0), watchos(3.0), tvos(10.0));
 
-@property (strong, nonatomic, nonnull) dispatch_queue_t coderQueue; // the queue to do image decoding
+@property (strong, nonatomic, nonnull) NSOperationQueue *coderQueue; // the serial operation queue to do image decoding
 #if SD_UIKIT
 @property (assign, nonatomic) UIBackgroundTaskIdentifier backgroundTaskId;
 #endif
@@ -89,7 +89,8 @@ typedef NSMutableDictionary<NSString *, id> SDCallbacksDictionary;
         _finished = NO;
         _expectedSize = 0;
         _unownedSession = session;
-        _coderQueue = dispatch_queue_create("com.hackemist.SDWebImageDownloaderOperationCoderQueue", DISPATCH_QUEUE_SERIAL);
+        _coderQueue = [NSOperationQueue new];
+        _coderQueue.maxConcurrentOperationCount = 1;
 #if SD_UIKIT
         _backgroundTaskId = UIBackgroundTaskInvalid;
 #endif
@@ -384,17 +385,18 @@ didReceiveResponse:(NSURLResponse *)response
         // Get the image data
         NSData *imageData = [self.imageData copy];
         
-        // progressive decode the image in coder queue
-        dispatch_async(self.coderQueue, ^{
-            @autoreleasepool {
+        // keep maxmium one progressive decode process during download
+        if (self.coderQueue.operationCount == 0) {
+            // NSOperation have autoreleasepool, don't need to create extra one
+            [self.coderQueue addOperationWithBlock:^{
                 UIImage *image = SDImageLoaderDecodeProgressiveImageData(imageData, self.request.URL, finished, self, [[self class] imageOptionsFromDownloaderOptions:self.options], self.context);
                 if (image) {
                     // We do not keep the progressive decoding image even when `finished`=YES. Because they are for view rendering but not take full function from downloader options. And some coders implementation may not keep consistent between progressive decoding and normal decoding.
                     
                     [self callCompletionBlocksWithImage:image imageData:nil error:nil finished:NO];
                 }
-            }
-        });
+            }];
+        }
     }
     
     for (SDWebImageDownloaderProgressBlock progressBlock in [self callbacksForKey:kProgressCallbackKey]) {
@@ -461,19 +463,18 @@ didReceiveResponse:(NSURLResponse *)response
                     [self callCompletionBlocksWithError:self.responseError];
                     [self done];
                 } else {
-                    // decode the image in coder queue
-                    dispatch_async(self.coderQueue, ^{
-                        @autoreleasepool {
-                            UIImage *image = SDImageLoaderDecodeImageData(imageData, self.request.URL, [[self class] imageOptionsFromDownloaderOptions:self.options], self.context);
-                            CGSize imageSize = image.size;
-                            if (imageSize.width == 0 || imageSize.height == 0) {
-                                [self callCompletionBlocksWithError:[NSError errorWithDomain:SDWebImageErrorDomain code:SDWebImageErrorBadImageData userInfo:@{NSLocalizedDescriptionKey : @"Downloaded image has 0 pixels"}]];
-                            } else {
-                                [self callCompletionBlocksWithImage:image imageData:imageData error:nil finished:YES];
-                            }
-                            [self done];
+                    // decode the image in coder queue, cancel all previous decoding process
+                    [self.coderQueue cancelAllOperations];
+                    [self.coderQueue addOperationWithBlock:^{
+                        UIImage *image = SDImageLoaderDecodeImageData(imageData, self.request.URL, [[self class] imageOptionsFromDownloaderOptions:self.options], self.context);
+                        CGSize imageSize = image.size;
+                        if (imageSize.width == 0 || imageSize.height == 0) {
+                            [self callCompletionBlocksWithError:[NSError errorWithDomain:SDWebImageErrorDomain code:SDWebImageErrorBadImageData userInfo:@{NSLocalizedDescriptionKey : @"Downloaded image has 0 pixels"}]];
+                        } else {
+                            [self callCompletionBlocksWithImage:image imageData:imageData error:nil finished:YES];
                         }
-                    });
+                        [self done];
+                    }];
                 }
             } else {
                 [self callCompletionBlocksWithError:[NSError errorWithDomain:SDWebImageErrorDomain code:SDWebImageErrorBadImageData userInfo:@{NSLocalizedDescriptionKey : @"Image data is nil"}]];