diff --git a/XRCarouselViewDemo/XRCarouselViewDemo/XRCarouselView/XRCarouselView.m b/XRCarouselViewDemo/XRCarouselViewDemo/XRCarouselView/XRCarouselView.m
index dd0a687..baa3930 100644
--- a/XRCarouselViewDemo/XRCarouselViewDemo/XRCarouselView/XRCarouselView.m
+++ b/XRCarouselViewDemo/XRCarouselViewDemo/XRCarouselView/XRCarouselView.m
@@ -86,6 +86,7 @@ - (CGFloat)width {
 - (NSOperationQueue *)queue {
     if (!_queue) {
         _queue = [[NSOperationQueue alloc] init];
+        [_queue setMaxConcurrentOperationCount:1];
     }
     return _queue;
 }