diff --git a/certbot_route53/authenticator.py b/certbot_route53/authenticator.py
index 2b941a7e5..915c0092d 100644
--- a/certbot_route53/authenticator.py
+++ b/certbot_route53/authenticator.py
@@ -16,9 +16,9 @@ logger = logging.getLogger(__name__)
 
 TTL = 30
 
+@zope.interface.implementer(interfaces.IAuthenticator)
+@zope.interface.provider(interfaces.IPluginFactory)
 class Authenticator(common.Plugin):
-    zope.interface.implements(interfaces.IAuthenticator)
-    zope.interface.classProvides(interfaces.IPluginFactory)
 
     description = "Route53 Authenticator"