Description: use system decorator package

diff --git a/pony/utils/utils.py b/pony/utils/utils.py
index 3ca3aa43..cb9f308f 100644
--- a/pony/utils/utils.py
+++ b/pony/utils/utils.py
@@ -16,7 +16,7 @@ import pony
 from pony import options
 
 from pony.thirdparty.compiler import ast
-from pony.thirdparty.decorator import decorator as _decorator
+from decorator import decorator as _decorator
 
 if pony.MODE.startswith('GAE-'): localbase = object
 else: from threading import local as localbase
