diff --git a/.travis.yml b/.travis.yml
index 87fd7f0..315289f 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,16 +1,13 @@
 sudo: false
 language: python
 python:
-  - "2.6"
   - "2.7"
-  - "3.3"
   - "3.4"
   - "3.5"
+  - "3.6"
 
   # command to install dependencies
 install:
-  - if [[ $TRAVIS_PYTHON_VERSION == '2.6' ]]; then pip install unittest2; fi
-  - if [[ $TRAVIS_PYTHON_VERSION == '2.6' ]]; then pip install argparse; fi
   - pip install .
 
 # command to run tests
diff --git a/doc/install.rst b/doc/install.rst
index 7e4c288..cc2f1f2 100644
--- a/doc/install.rst
+++ b/doc/install.rst
@@ -7,19 +7,8 @@ TestLink-API-Python-client Installation
 Preconditions
 -------------
 
-Currently the combinations Python 2.6.9/2.7.12/3.3.5/3.4.4/3.5.2 are tested with 
-TestLink 1.9.15 including the fixes 
-
-- `TL 7696 <http://mantis.testlink.org/view.php?id=7696>`_ ,
-  `TL 7708 <http://mantis.testlink.org/view.php?id=7708>`_ and
-  `TL 7765 <http://mantis.testlink.org/view.php?id=7765>`_
-
-Other combination might work - feedback is welcome :-) 
-
-To use TestLink-API-Python-client under Py26, the module **argparse** must be 
-installed additionally (Py27, Py33, Py34 and Py35 already includes this)::
-
-    pip install argparse
+Currently the combinations Python 2.7.13/3.4.4/3.5.3/3.6.1 are tested with 
+TestLink 1.9.16. Other combination might work - feedback is welcome :-) 
 
 TestLink configuration
 ----------------------
@@ -116,7 +105,7 @@ with connection parameter as environment variables
 - TESTLINK_API_PYTHON_SERVER_URL and TESTLINK_API_PYTHON_DEVKEY 
 
 Known Installation Problems
-----------------------------
+---------------------------
 
 If the installation for the combination **linux + py26** fails, maybe the workaround from  `issue 50`_ helps.
 
diff --git a/setup.py b/setup.py
index 7c32102..ce29916 100644
--- a/setup.py
+++ b/setup.py
@@ -17,11 +17,10 @@
   'Development Status :: 5 - Production/Stable',
   'License :: OSI Approved :: Apache Software License',
   'Operating System :: OS Independent',
-  'Programming Language :: Python :: 2.6',
   'Programming Language :: Python :: 2.7',
-  'Programming Language :: Python :: 3.3',
   'Programming Language :: Python :: 3.4',
   'Programming Language :: Python :: 3.5',
+  'Programming Language :: Python :: 3.6',
   'Topic :: Software Development :: Testing',
   'Topic :: Software Development :: Libraries :: Python Modules'
 ]
diff --git a/src/testlink/version.py b/src/testlink/version.py
index 2be21fe..d499955 100644
--- a/src/testlink/version.py
+++ b/src/testlink/version.py
@@ -17,6 +17,6 @@
 #
 # ------------------------------------------------------------------------
 
-VERSION = '0.6.4-dev080'
+VERSION = '0.6.4-dev084'
 TL_RELEASE = '1.9.16'
 
diff --git a/tox.ini b/tox.ini
index ddd1cbe..3620364 100644
--- a/tox.ini
+++ b/tox.ini
@@ -4,11 +4,9 @@
 #   TESTLINK_API_PYTHON_DEVKEY and TESTLINK_API_PYTHON_SERVER_URL
 #   with your server settings
 [tox]
-envlist = py26,py27,py33,py34,py35
+envlist = py27,py34,py35,py36
 [testenv]
 deps=pytest
-     py26: unittest2
-     py26: argparse
 setenv=
      TESTLINK_API_PYTHON_DEVKEY={env:TESTLINK_API_PYTHON_DEVKEY:3ec96581bb3d8a34cd28ce338b641063}
      TESTLINK_API_PYTHON_SERVER_URL={env:TESTLINK_API_PYTHON_SERVER_URL:http://demo.testlink.org/latest/lib/api/xmlrpc/v1/xmlrpc.php}