diff --git a/AFNetworking/AFImageRequestOperation.m b/AFNetworking/AFImageRequestOperation.m
index e39c9d6..7fb166d 100644
--- a/AFNetworking/AFImageRequestOperation.m
+++ b/AFNetworking/AFImageRequestOperation.m
@@ -25,7 +25,7 @@
 static dispatch_queue_t af_image_request_operation_processing_queue;
 static dispatch_queue_t image_request_operation_processing_queue() {
     if (af_image_request_operation_processing_queue == NULL) {
-        af_image_request_operation_processing_queue = dispatch_queue_create("com.alamofire.networking.image-request.processing", 0);
+        af_image_request_operation_processing_queue = dispatch_queue_create("com.alamofire.networking.image-request.processing", DISPATCH_QUEUE_CONCURRENT);
     }
 
     return af_image_request_operation_processing_queue;
diff --git a/AFNetworking/AFJSONRequestOperation.m b/AFNetworking/AFJSONRequestOperation.m
index a078e52..3d713b7 100644
--- a/AFNetworking/AFJSONRequestOperation.m
+++ b/AFNetworking/AFJSONRequestOperation.m
@@ -25,7 +25,7 @@
 static dispatch_queue_t af_json_request_operation_processing_queue;
 static dispatch_queue_t json_request_operation_processing_queue() {
     if (af_json_request_operation_processing_queue == NULL) {
-        af_json_request_operation_processing_queue = dispatch_queue_create("com.alamofire.networking.json-request.processing", 0);
+        af_json_request_operation_processing_queue = dispatch_queue_create("com.alamofire.networking.json-request.processing", DISPATCH_QUEUE_CONCURRENT);
     }
 
     return af_json_request_operation_processing_queue;
diff --git a/AFNetworking/AFPropertyListRequestOperation.m b/AFNetworking/AFPropertyListRequestOperation.m
index 38229ce..d9612f7 100644
--- a/AFNetworking/AFPropertyListRequestOperation.m
+++ b/AFNetworking/AFPropertyListRequestOperation.m
@@ -25,7 +25,7 @@
 static dispatch_queue_t af_property_list_request_operation_processing_queue;
 static dispatch_queue_t property_list_request_operation_processing_queue() {
     if (af_property_list_request_operation_processing_queue == NULL) {
-        af_property_list_request_operation_processing_queue = dispatch_queue_create("com.alamofire.networking.property-list-request.processing", 0);
+        af_property_list_request_operation_processing_queue = dispatch_queue_create("com.alamofire.networking.property-list-request.processing", DISPATCH_QUEUE_CONCURRENT);
     }
 
     return af_property_list_request_operation_processing_queue;
diff --git a/AFNetworking/AFXMLRequestOperation.m b/AFNetworking/AFXMLRequestOperation.m
index 7e6b352..8ebd4ed 100644
--- a/AFNetworking/AFXMLRequestOperation.m
+++ b/AFNetworking/AFXMLRequestOperation.m
@@ -27,7 +27,7 @@
 static dispatch_queue_t af_xml_request_operation_processing_queue;
 static dispatch_queue_t xml_request_operation_processing_queue() {
     if (af_xml_request_operation_processing_queue == NULL) {
-        af_xml_request_operation_processing_queue = dispatch_queue_create("com.alamofire.networking.xml-request.processing", 0);
+        af_xml_request_operation_processing_queue = dispatch_queue_create("com.alamofire.networking.xml-request.processing", DISPATCH_QUEUE_CONCURRENT);
     }
 
     return af_xml_request_operation_processing_queue;