diff --git a/openid_provider/lib/endpoints/token.py b/openid_provider/lib/endpoints/token.py
index 4718514..6f8fbfd 100644
--- a/openid_provider/lib/endpoints/token.py
+++ b/openid_provider/lib/endpoints/token.py
@@ -84,7 +84,7 @@ class TokenEndpoint(object):
         return dic
 
     @classmethod
-    def response(self, dic, status=200):
+    def response(cls, dic, status=200):
         """
         Create and return a response object.
         """
diff --git a/openid_provider/lib/endpoints/userinfo.py b/openid_provider/lib/endpoints/userinfo.py
index 84b56ab..a4b379e 100644
--- a/openid_provider/lib/endpoints/userinfo.py
+++ b/openid_provider/lib/endpoints/userinfo.py
@@ -64,7 +64,7 @@ class UserInfoEndpoint(object):
         return dic
 
     @classmethod
-    def response(self, dic):
+    def response(cls, dic):
 
         response = JsonResponse(dic, status=200)
         response['Cache-Control'] = 'no-store'
@@ -73,7 +73,7 @@ class UserInfoEndpoint(object):
         return response
 
     @classmethod
-    def error_response(self, code, description, status):
+    def error_response(cls, code, description, status):
 
         response = HttpResponse(status=status)
         response['WWW-Authenticate'] = 'error="{0}", error_description="{1}"'.format(code, description)