diff --git a/AFNetworking/AFHTTPClient.m b/AFNetworking/AFHTTPClient.m
index 1dd08ad..619e7c9 100644
--- a/AFNetworking/AFHTTPClient.m
+++ b/AFNetworking/AFHTTPClient.m
@@ -703,7 +703,7 @@ static inline NSString * AFMultipartFormFinalBoundary() {
     self.request = request;
     self.stringEncoding = encoding;
     
-    self.temporaryFilePath = [AFMultipartTemporaryFileDirectoryPath() stringByAppendingPathComponent:[NSString stringWithFormat:@"%u", [[self.request URL] hash]]];
+    self.temporaryFilePath = [AFMultipartTemporaryFileDirectoryPath() stringByAppendingPathComponent:[NSString stringWithFormat:@"%lu", [[self.request URL] hash]]];
     self.outputStream = [NSOutputStream outputStreamToFileAtPath:self.temporaryFilePath append:NO];
     
     NSRunLoop *runLoop = [NSRunLoop currentRunLoop];
diff --git a/AFNetworking/AFHTTPRequestOperation.m b/AFNetworking/AFHTTPRequestOperation.m
index 2927da7..67825ab 100644
--- a/AFNetworking/AFHTTPRequestOperation.m
+++ b/AFNetworking/AFHTTPRequestOperation.m
@@ -76,11 +76,11 @@ static NSString * AFStringFromIndexSet(NSIndexSet *indexSet) {
         }
 
         if (range.length == 1) {
-            [string appendFormat:@"%u", range.location];
+            [string appendFormat:@"%lu", range.location];
         } else {
             NSUInteger firstIndex = range.location;
             NSUInteger lastIndex = firstIndex + range.length - 1;
-            [string appendFormat:@"%u-%u", firstIndex, lastIndex];
+            [string appendFormat:@"%lu-%lu", firstIndex, lastIndex];
         }
 
         range.location = nextIndex;