3 files changed, 3 insertions, 3 deletions
diff --git a/slixmpp/plugins/xep_0332/stanza/data.py b/slixmpp/plugins/xep_0332/stanza/data.py
index a19c94f5..92e3d3af 100644
--- a/slixmpp/plugins/xep_0332/stanza/data.py
+++ b/slixmpp/plugins/xep_0332/stanza/data.py
@@ -17,7 +17,7 @@ class HTTPData(ElementBase):
     """
     name = 'data'
     namespace = 'urn:xmpp:http'
-    interfaces = set(['data'])
+    interfaces = {'data'}
     plugin_attrib = 'data'
     is_extension = True
 
diff --git a/slixmpp/plugins/xep_0332/stanza/request.py b/slixmpp/plugins/xep_0332/stanza/request.py
index e3e46361..1d4aa5b1 100644
--- a/slixmpp/plugins/xep_0332/stanza/request.py
+++ b/slixmpp/plugins/xep_0332/stanza/request.py
@@ -49,7 +49,7 @@ class HTTPRequest(ElementBase):
 
     name = 'request'
     namespace = 'urn:xmpp:http'
-    interfaces = set(['method', 'resource', 'version'])
+    interfaces = {'method', 'resource', 'version'}
     plugin_attrib = 'http-req'
 
     def get_method(self):
diff --git a/slixmpp/plugins/xep_0332/stanza/response.py b/slixmpp/plugins/xep_0332/stanza/response.py
index a0b8fe34..8f58f0c2 100644
--- a/slixmpp/plugins/xep_0332/stanza/response.py
+++ b/slixmpp/plugins/xep_0332/stanza/response.py
@@ -46,7 +46,7 @@ class HTTPResponse(ElementBase):
 
     name = 'response'
     namespace = 'urn:xmpp:http'
-    interfaces = set(['code', 'message', 'version'])
+    interfaces = {'code', 'message', 'version'}
     plugin_attrib = 'http-resp'
 
     def get_code(self):