2 files changed, 5 insertions, 4 deletions
diff --git a/slixmpp/features/feature_mechanisms/mechanisms.py b/slixmpp/features/feature_mechanisms/mechanisms.py
index dfdca010..db2d73d0 100644
--- a/slixmpp/features/feature_mechanisms/mechanisms.py
+++ b/slixmpp/features/feature_mechanisms/mechanisms.py
@@ -1,4 +1,3 @@
-
 # Slixmpp: The Slick XMPP Library
 # Copyright (C) 2011  Nathanael C. Fritz
 # This file is part of Slixmpp.
@@ -15,6 +14,8 @@ from slixmpp.xmlstream.matcher import MatchXPath
 from slixmpp.xmlstream.handler import Callback
 from slixmpp.features.feature_mechanisms import stanza
 
+from typing import ClassVar, Set
+
 
 log = logging.getLogger(__name__)
 
@@ -23,7 +24,7 @@ class FeatureMechanisms(BasePlugin):
 
     name = 'feature_mechanisms'
     description = 'RFC 6120: Stream Feature: SASL'
-    dependencies = set()
+    dependencies: ClassVar[Set[str]] = set()
     stanza = stanza
     default_config = {
         'use_mech': None,
diff --git a/slixmpp/features/feature_mechanisms/stanza/abort.py b/slixmpp/features/feature_mechanisms/stanza/abort.py
index afa75cde..a430fa0f 100644
--- a/slixmpp/features/feature_mechanisms/stanza/abort.py
+++ b/slixmpp/features/feature_mechanisms/stanza/abort.py
@@ -1,9 +1,9 @@
-
 # Slixmpp: The Slick XMPP Library
 # Copyright (C) 2011  Nathanael C. Fritz
 # This file is part of Slixmpp.
 # See the file LICENSE for copying permission.
 from slixmpp.xmlstream import StanzaBase
+from typing import ClassVar, Set
 
 
 class Abort(StanzaBase):
@@ -13,7 +13,7 @@ class Abort(StanzaBase):
 
     name = 'abort'
     namespace = 'urn:ietf:params:xml:ns:xmpp-sasl'
-    interfaces = set()
+    interfaces: ClassVar[Set[str]] = set()
     plugin_attrib = name
 
     def setup(self, xml):