diff --git a/MKNetworkKit/Categories/UIAlertView+MKNetworkKitAdditions.m b/MKNetworkKit/Categories/UIAlertView+MKNetworkKitAdditions.m
index 887deba..0285462 100644
--- a/MKNetworkKit/Categories/UIAlertView+MKNetworkKitAdditions.m
+++ b/MKNetworkKit/Categories/UIAlertView+MKNetworkKitAdditions.m
@@ -23,6 +23,7 @@
 //  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 //  THE SOFTWARE.
 #if TARGET_OS_IPHONE
+#if !TARGET_IS_EXTENSION
 #import "UIAlertView+MKNetworkKitAdditions.h"
 
 @implementation UIAlertView (MKNetworkKitAdditions)
@@ -39,3 +40,4 @@ +(UIAlertView*) showWithError:(NSError*) networkError {
 }
 @end
 #endif
+#endif
diff --git a/MKNetworkKit/MKNetworkEngine.m b/MKNetworkKit/MKNetworkEngine.m
index a238f97..44637ca 100644
--- a/MKNetworkKit/MKNetworkEngine.m
+++ b/MKNetworkKit/MKNetworkEngine.m
@@ -190,8 +190,10 @@ + (void) observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object
     [[NSNotificationCenter defaultCenter] postNotificationName:kMKNetworkEngineOperationCountChanged
                                                         object:[NSNumber numberWithInteger:(NSInteger)[_sharedNetworkQueue operationCount]]];
 #if TARGET_OS_IPHONE
+#if !TARGET_IS_EXTENSION
     [UIApplication sharedApplication].networkActivityIndicatorVisible =
     ([_sharedNetworkQueue.operations count] > 0);
+#endif
 #endif
   }
   else {
diff --git a/MKNetworkKit/MKNetworkOperation.m b/MKNetworkKit/MKNetworkOperation.m
index 4932304..cd42ace 100644
--- a/MKNetworkKit/MKNetworkOperation.m
+++ b/MKNetworkKit/MKNetworkOperation.m
@@ -890,6 +890,7 @@ -(void) main {
 -(void) endBackgroundTask {
   
 #if TARGET_OS_IPHONE
+#if !TARGET_IS_EXTENSION
   dispatch_async(dispatch_get_main_queue(), ^{
     if (self.backgroundTaskId != UIBackgroundTaskInvalid) {
       [[UIApplication sharedApplication] endBackgroundTask:self.backgroundTaskId];
@@ -897,12 +898,14 @@ -(void) endBackgroundTask {
     }
   });
 #endif
+#endif
 }
 
 - (void) start
 {
   
 #if TARGET_OS_IPHONE
+#if !TARGET_IS_EXTENSION
   self.backgroundTaskId = [[UIApplication sharedApplication] beginBackgroundTaskWithExpirationHandler:^{
     
     dispatch_async(dispatch_get_main_queue(), ^{
@@ -915,6 +918,7 @@ - (void) start
     });
   }];
   
+#endif
 #endif
   
   if(!self.isCancelled) {
@@ -1482,6 +1486,7 @@ -(void) operationSucceeded {
 
 -(void) showLocalNotification {
 #if TARGET_OS_IPHONE
+#if !TARGET_IS_EXTENSION
   
   if(self.localNotification) {
     
@@ -1496,6 +1501,7 @@ -(void) showLocalNotification {
     [[UIApplication sharedApplication] presentLocalNotificationNow:localNotification];
   }
 #endif
+#endif
 }
 
 -(void) operationFailedWithError:(NSError*) error {
@@ -1509,9 +1515,11 @@ -(void) operationFailedWithError:(NSError*) error {
     errorBlock(self, error);
   
 #if TARGET_OS_IPHONE
+#if !TARGET_IS_EXTENSION
   if([[UIApplication sharedApplication] applicationState] == UIApplicationStateBackground)
     [self showLocalNotification];
 #endif
+#endif
   
 }
 
diff --git a/README.mdown b/README.mdown
index cb28766..886394a 100644
--- a/README.mdown
+++ b/README.mdown
@@ -1,3 +1,4 @@
+加一个测试
 This is version 0.87 of MKNetworkKit. Read the [blog post](http://mk.sg/8w) for more. The latest code is still not fully testing on Mac, though iOS is complete. Caching responses and invalidation of cache is not implemented the right way for the Mac target. 
 
 MKNetworkKit is ready for production use on iOS apps. As on date, it's used by several thousands of apps including [Digg](https://itunes.apple.com/us/app/digg/id362872995?mt=8)