diff --git a/AFNetworking/AFHTTPClient.m b/AFNetworking/AFHTTPClient.m
index b366be2..e8898d1 100644
--- a/AFNetworking/AFHTTPClient.m
+++ b/AFNetworking/AFHTTPClient.m
@@ -150,7 +150,7 @@ NSArray * AFQueryStringPairsFromKeyAndValue(NSString *key, id value) {
             [mutableQueryStringComponents addObjectsFromArray:AFQueryStringPairsFromKeyAndValue((key ? [NSString stringWithFormat:@"%@[%@]", key, nestedKey] : nestedKey), nestedValue)];
         }];
     } else if([value isKindOfClass:[NSArray class]]) {
-		NSArray *array = value;
+        NSArray *array = value;
         [array enumerateObjectsUsingBlock:^(id nestedValue, __unused NSUInteger idx, __unused BOOL *stop) {
             [mutableQueryStringComponents addObjectsFromArray:AFQueryStringPairsFromKeyAndValue([NSString stringWithFormat:@"%@[]", key], nestedValue)];
         }];
@@ -296,7 +296,7 @@ static void AFNetworkReachabilityCallback(SCNetworkReachabilityRef __unused targ
         block(status);
     }
     
-	NSNotificationCenter *notificationCenter = [NSNotificationCenter defaultCenter];
+    NSNotificationCenter *notificationCenter = [NSNotificationCenter defaultCenter];
     [notificationCenter postNotificationName:AFNetworkingReachabilityDidChangeNotification object:nil userInfo:[NSDictionary dictionaryWithObject:[NSNumber numberWithInteger:status] forKey:AFNetworkingReachabilityNotificationStatusItem]];
 }
 
diff --git a/AFNetworking/AFURLConnectionOperation.m b/AFNetworking/AFURLConnectionOperation.m
index 7c756cf..1f90136 100644
--- a/AFNetworking/AFURLConnectionOperation.m
+++ b/AFNetworking/AFURLConnectionOperation.m
@@ -310,7 +310,7 @@ static inline BOOL AFStateTransitionIsValid(AFOperationState fromState, AFOperat
         [self didChangeValueForKey:oldStateKey];
         [self didChangeValueForKey:newStateKey];
         
-		NSNotificationCenter *notificationCenter = [NSNotificationCenter defaultCenter];
+        NSNotificationCenter *notificationCenter = [NSNotificationCenter defaultCenter];
 		
         switch (state) {
             case AFOperationExecutingState:
@@ -354,7 +354,7 @@ static inline BOOL AFStateTransitionIsValid(AFOperationState fromState, AFOperat
     if ([self isExecuting]) {
         [self.connection performSelector:@selector(cancel) onThread:[[self class] networkRequestThread] withObject:nil waitUntilDone:NO modes:[self.runLoopModes allObjects]];
 
-		NSNotificationCenter *notificationCenter = [NSNotificationCenter defaultCenter];
+        NSNotificationCenter *notificationCenter = [NSNotificationCenter defaultCenter];
         [notificationCenter postNotificationName:AFNetworkingOperationDidFinishNotification object:self];
     }