diff --git a/src/node/ext/zodb/parts.py b/src/node/ext/zodb/parts.py
index 3417909..c394df8 100644
--- a/src/node/ext/zodb/parts.py
+++ b/src/node/ext/zodb/parts.py
@@ -7,7 +7,7 @@
     plumb,
 )
 from persistent import Persistent
-from zope.interface import implements
+from zope.interface import implementer
 from node.interfaces import (
     INode,
     IAttributes,
@@ -24,10 +24,10 @@
 )
 
 
+@implementer(IZODBNode)
 class ZODBPart(Part):
     """This part requires plumbed class to inherit from Persistent.
     """
-    implements(IZODBNode)
     
     @extend
     @property
@@ -88,9 +88,8 @@ def storage(self):
         return OOBTodict()
 
 
+@implementer(IAttributes)
 class ZODBAttributes(Part):
-    implements(IAttributes)
-    
     attribute_access_for_attrs = default(False)
     attributes_factory = default(None)