diff --git a/AFNetworking/AFImageRequestOperation.m b/AFNetworking/AFImageRequestOperation.m
index cd6ce8e..f0c7b59 100644
--- a/AFNetworking/AFImageRequestOperation.m
+++ b/AFNetworking/AFImageRequestOperation.m
@@ -47,26 +47,28 @@ static inline CGSize kAFImageRequestRoundedCornerRadii(CGSize imageSize) {
                    success:(void (^)(UIImage *image))success
 {
     return [self operationWithRequest:urlRequest completion:^(NSURLRequest *request, NSHTTPURLResponse *response, NSData *data, NSError *error) {
-        UIImage *image = nil;    
-        if ([[UIScreen mainScreen] scale] == 2.0) {
-            CGImageRef imageRef = [[UIImage imageWithData:data] CGImage];
-            image = [UIImage imageWithCGImage:imageRef scale:2.0 orientation:UIImageOrientationUp];
-        } else {
-            image = [UIImage imageWithData:data]; 
-        }
-        
-        if (!(CGSizeEqualToSize(image.size, imageSize) || CGSizeEqualToSize(imageSize, CGSizeZero))) {
-            image = [UIImage imageByScalingAndCroppingImage:image size:imageSize];
-        }
-        if ((options & AFImageRequestRoundCorners)) {
-            image = [UIImage imageByRoundingCornersOfImage:image corners:UIRectCornerAllCorners cornerRadii:kAFImageRequestRoundedCornerRadii(image.size)];
-        }
-        
-        if (success) {
-            success(image);
-        }
-        
         dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^(void) {
+            UIImage *image = nil;    
+            if ([[UIScreen mainScreen] scale] == 2.0) {
+                CGImageRef imageRef = [[UIImage imageWithData:data] CGImage];
+                image = [UIImage imageWithCGImage:imageRef scale:2.0 orientation:UIImageOrientationUp];
+            } else {
+                image = [UIImage imageWithData:data]; 
+            }
+            
+            if (!(CGSizeEqualToSize(image.size, imageSize) || CGSizeEqualToSize(imageSize, CGSizeZero))) {
+                image = [UIImage imageByScalingAndCroppingImage:image size:imageSize];
+            }
+            if ((options & AFImageRequestRoundCorners)) {
+                image = [UIImage imageByRoundingCornersOfImage:image corners:UIRectCornerAllCorners cornerRadii:kAFImageRequestRoundedCornerRadii(image.size)];
+            }
+            
+            dispatch_sync(dispatch_get_main_queue(), ^(void) {
+                if (success) {
+                    success(image);
+                }
+            });
+        
             [[AFImageCache sharedImageCache] cacheImage:image forRequest:request imageSize:imageSize options:options];
         });
     }];
diff --git a/AFNetworking/AFJSONRequestOperation.m b/AFNetworking/AFJSONRequestOperation.m
index f7c699c..66f195a 100644
--- a/AFNetworking/AFJSONRequestOperation.m
+++ b/AFNetworking/AFJSONRequestOperation.m
@@ -62,27 +62,31 @@
                 failure(error);
             }
         } else {
-            id JSON = nil;
-
-            #if __IPHONE_OS_VERSION_MIN_REQUIRED > __IPHONE_4_3
-            if ([NSJSONSerialization class]) {
-                JSON = [NSJSONSerialization JSONObjectWithData:data options:0 error:&error];
-            } else {
+            dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^(void) {
+                id JSON = nil;
+                
+#if __IPHONE_OS_VERSION_MIN_REQUIRED > __IPHONE_4_3
+                if ([NSJSONSerialization class]) {
+                    JSON = [NSJSONSerialization JSONObjectWithData:data options:0 error:&error];
+                } else {
+                    JSON = [[JSONDecoder decoder] objectWithData:data error:&error];
+                }
+#else
                 JSON = [[JSONDecoder decoder] objectWithData:data error:&error];
-            }
-            #else
-            JSON = [[JSONDecoder decoder] objectWithData:data error:&error];
-            #endif
-
-            if (error) {
-                if (failure) {
-                    failure(error);
-                }
-            } else {
-                if (success) {
-                    success(JSON);
-                }
-            }
+#endif
+                
+                dispatch_sync(dispatch_get_main_queue(), ^(void) {
+                    if (error) {
+                        if (failure) {
+                            failure(error);
+                        }
+                    } else {
+                        if (success) {
+                            success(JSON);
+                        }
+                    }
+                });
+            });
         }
     }];
 }