diff --git a/.gitignore b/.gitignore
index d0ff684..ae98e7c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -10,3 +10,4 @@ dist/
 temp.css
 textmark_*
 sphinxmark.egg-info/
+.pytest_cache/
diff --git a/README.rst b/README.rst
index 02df97a..7d9f0ff 100644
--- a/README.rst
+++ b/README.rst
@@ -14,7 +14,7 @@ sphinxmark
 .. image:: https://img.shields.io/badge/Python-2.7-brightgreen.svg?style=flat
    :target: http://python.org
 
-.. image:: https://img.shields.io/badge/Python-3.4-brightgreen.svg?style=flat
+.. image:: https://img.shields.io/badge/Python-3.6-brightgreen.svg?style=flat
    :target: http://python.org
 
 .. image:: http://img.shields.io/badge/license-apache-blue.svg?style=flat
diff --git a/tox.ini b/tox.ini
index e2c3004..142f08a 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,6 +1,6 @@
 [tox]
 minversion = 2.3
-envlist = doc, bashate, flake8, isort, pep257, py27, py3
+envlist = doc, bashate, flake8, isort, pep257, py27, py36
 skipsdist = True
 
 [testenv]