diff --git a/MASFoundation/Classes/_private_/services/network/MASNetworkingService.m b/MASFoundation/Classes/_private_/services/network/MASNetworkingService.m
index 542d6e4..4ba3f8f 100644
--- a/MASFoundation/Classes/_private_/services/network/MASNetworkingService.m
+++ b/MASFoundation/Classes/_private_/services/network/MASNetworkingService.m
@@ -1894,8 +1894,6 @@ - (void)cancelAllRequests
     NSLog(@"Cancel All Requests");
     [[_sessionManager operationQueue] cancelAllOperations];
     [[_sessionManager internalOperationQueue] cancelAllOperations];
-    [[_sessionManager operationQueue] removeObserver:self forKeyPath:@"operations" context:&kMASNetworkQueueOperationsChanged];
-
 }