diff --git a/debian/control b/debian/control
index 722473d..13443a2 100644
--- a/debian/control
+++ b/debian/control
@@ -1,19 +1,19 @@
 Source: sylkserver
 Section: net
 Priority: optional
 Maintainer: Saul Ibarra <saul@ag-projects.com>
 Uploaders: Dan Pascu <dan@ag-projects.com>, Adrian Georgescu <ag@ag-projects.com>
 Build-Depends: debhelper (>= 7.3.5), python-all (>= 2.5)
 Standards-Version: 3.9.2
 
 Package: sylkserver
 Architecture: all
-Depends: ${python:Depends}, ${misc:Depends}, python-application (>= 1.2.9), python-backports, python-eventlet-0.8, python-sipsimple (>= 0.19.0), python-sqlobject (>= 0.12.4), python-twisted-words
+Depends: ${python:Depends}, ${misc:Depends}, python-application (>= 1.2.9), python-backports, python-eventlet-0.8, python-sipsimple (>= 0.20.0), python-sqlobject (>= 0.12.4), python-twisted-words
 Suggests: python-mysqldb
 Description: A state of the art, extensible SIP Application Server
  SylkServer allows creation and delivery of rich multimedia applications
  accessed by SIP User Agents.  The server supports SIP signaling over TLS,
  TCP and UDP transports, RTP and MSRP media planes, has built in
  capabilities for creating ad-hoc SIP multimedia conferences with HD Audio,
  IM and File Transfer and can be easily extended with other applications by
  using Python programming language.
diff --git a/sylk/__init__.py b/sylk/__init__.py
index a4a0863..688071a 100644
--- a/sylk/__init__.py
+++ b/sylk/__init__.py
@@ -1,25 +1,25 @@
 # Copyright (C) 2010-2011 AG Projects. See LICENSE for details
 
 """SylkServer"""
 
 __version__ = '1.2.3'
 
 configuration_filename = "config.ini"
 
 
 package_requirements = {'python-application': '1.2.9',
-                        'python-sipsimple': '0.19.0'}
+                        'python-sipsimple': '0.20.0'}
 
 try:
     from application.dependency import ApplicationDependencies
 except:
     class DependencyError(Exception): pass
     class ApplicationDependencies(object):
         def __init__(self, *args, **kwargs):
             pass
         def check(self):
             raise DependencyError("need python-application version %s or higher but it's not installed" % package_requirements['python-application'])
 
 dependencies = ApplicationDependencies(**package_requirements)