diff --git a/oscarapi/serializers/fields.py b/oscarapi/serializers/fields.py
index b426811c..a9e3c9b7 100644
--- a/oscarapi/serializers/fields.py
+++ b/oscarapi/serializers/fields.py
@@ -305,7 +305,7 @@ def __str__(self):
     def __bool__(self):
         return bool(self.url)
 
-    def open(self, mode="rb"):
+    def open(self, *args, mode="rb", **kwargs):
         if not self.closed:
             self.seek(0)