diff --git a/XMNetworking/Core/XMEngine.m b/XMNetworking/Core/XMEngine.m
index f180807..09a25d9 100644
--- a/XMNetworking/Core/XMEngine.m
+++ b/XMNetworking/Core/XMEngine.m
@@ -378,8 +378,7 @@ - (AFJSONResponseSerializer *)afJSONResponseSerializer {
     if (!_afJSONResponseSerializer) {
         _afJSONResponseSerializer = [AFJSONResponseSerializer serializer];
         // Append more other commonly-used types to the JSON responses accepted MIME types.
-        _afJSONResponseSerializer.acceptableContentTypes = [NSSet setWithObjects:@"application/json", @"text/json", @"text/javascript", @"text/html", @"text/plain", nil];
-        
+        //_afJSONResponseSerializer.acceptableContentTypes = [NSSet setWithObjects:@"application/json", @"text/json", @"text/javascript", @"text/html", @"text/plain", nil];
     }
     return _afJSONResponseSerializer;
 }
diff --git a/XMNetworking/Core/XMRequest.m b/XMNetworking/Core/XMRequest.m
index dd12bb3..ac96db1 100644
--- a/XMNetworking/Core/XMRequest.m
+++ b/XMNetworking/Core/XMRequest.m
@@ -231,7 +231,7 @@ - (void)onFinishedOneRequest:(XMRequest *)request response:(id)responseObject er
             }
         } else {
             XM_SAFE_BLOCK(_chainSuccessBlock, _responseArray);
-            XM_SAFE_BLOCK(_chainFinishedBlock, nil, _responseArray);
+            XM_SAFE_BLOCK(_chainFinishedBlock, _responseArray, nil);
             [self cleanCallbackBlocks];
         }
     } else {