diff --git a/session.py b/session.py
index d877078..e7cd9b6 100644
--- a/session.py
+++ b/session.py
@@ -83,6 +83,7 @@ from yowsupwrapper import YowsupApp
 class Session(YowsupApp):
 
 	def __init__(self, backend, user, legacyName, extra, db):
+		super(Session, self).__init__()
 		self.logger = logging.getLogger(self.__class__.__name__)
 		self.logger.info("Created: %s", legacyName)
 
diff --git a/yowsupwrapper.py b/yowsupwrapper.py
index 70aa049..bc7e592 100644
--- a/yowsupwrapper.py
+++ b/yowsupwrapper.py
@@ -32,7 +32,7 @@ from yowsup.layers.protocol_messages.protocolentities  import TextMessageProtoco
 from yowsup.layers.protocol_chatstate.protocolentities import *
 from yowsup.layers.protocol_acks.protocolentities	 import *
 
-class YowsupApp:
+class YowsupApp(object):
 	def __init__(self):
 		env.CURRENT_ENV = env.S40YowsupEnv()
 
@@ -234,7 +234,7 @@ class YowsupAppLayer(YowInterfaceLayer):
 		self.caller.onReceipt(_id, _from, timestamp, type, participant, offline, items)
 
 	@ProtocolEntityCallback('ack')
-	def onAck(self, entity)
+	def onAck(self, entity):
 		# entity is IncomingAckProtocolEntity
 		self.caller.onAck(
 			entity._id,