diff --git a/rfoo/_rfoo.py b/rfoo/_rfoo.py
index 255bb35..59541cd 100644
--- a/rfoo/_rfoo.py
+++ b/rfoo/_rfoo.py
@@ -103,7 +103,7 @@ INTEGER = 'i'.encode()[0]
 
 
 _loads = _marshal.loads
-_dumps = _marshal.dumps
+_dumps = lambda x: _marshal.dumps(x, 2)